SECURITIES AND EXCHANGE COMMISSION

                     Washington, D.C. 20549

                           FORM 8-K/A

                         CURRENT REPORT


               Pursuant to Section 13 or 15(d) of
              the Securities Exchange Act of 1934

                Date of Report: October 15, 1998


    Southwest Royalties Institutional Income Fund X-B, L.P.
           (Exact name of registrant as specified in
               its limited partnership agreement)



Delaware                                                  0-19601
                              75-2332174
(State   or  other  jurisdiction        Commission            IRS
Employer
of        incorporation)                        File       Number
Identification No.




       407 N. Big Spring, Suite 300, Midland, Texas 79701
       (Address of principal executive office) (Zip Code)


Registrant's telephone number, including area code (915) 686-9927


                              None
 (Former name or former address, if changed since last report.)




The total number of pages contained in this report is 9.








Item 2.   Acquisition or Disposition of Assets

          (a)    On   October   15,  1998,  Southwest   Royalties
          Institutional  Income Fund X-B (the "Registrant")  sold
          its  interest in 35 oil and gas properties to  Parks  &
          Luttrell,  Inc.  ("Parks"),  an  unrelated  party.  The
          Registrant's  interest in the properties was  sold  for
          net  proceeds,  after  post  closing  adjustments,   of
          $95,201.   At December 31, 1997, the property  sold  to
          Parks  contained proved reserves of 13,895  barrels  of
          oil  and 258,982 mcfs of gas and had a SEC 10 value  of
          $254,948.  The proceeds from the sale represented 8.70%
          of the Registrant's total assets.


Item 7.   Financial Statements and Exhibits

     (b)  Pro Forma Financial Information
          
          The   accompanying   unaudited  pro   forma   financial
          information of the Registrant is presented  to  reflect
          the sale of oil and gas properties on October 15, 1998.
          The  unaudited pro forma balance sheet is presented  as
          if  the sale of the oil and gas properties occurred  at
          the  balance  sheet  date and the unaudited  pro  forma
          statements of operations are presented as if  the  sale
          of the properties occurred on January 1, 1997.
          
     (c)  Exhibits
          
          None





            Unaudited Pro Forma Financial Statements
                                
      The  Unaudited  Pro  Forma Financial Statements  have  been
prepared to give effect to the sale of oil and gas properties  on
October  15, 1998.  The Unaudited Pro Forma Financial  Statements
of the Registrant are not necessarily indicative of the financial
results  for the periods presented had the sale of the properties
taken place on January 1, 1997.  In addition, future results  may
vary significantly from the results reflected in the accompanying
Unaudited  Pro  Forma  Financial  Statements  because  of  normal
production  declines and changes in product prices,  among  other
factors.  This information should be read in conjunction with the
Financial  Statements of the Registrant (and the  related  notes)
included  in  the Annual Report on Form 10-K for the  year  ended
December  31, 1997 and in the Quarterly Report on Form  10-Q  for
the nine months ended September 30, 1998.



     Southwest Royalties Institutional Income Fund X-B, L.P.
                                
                Unaudited Pro Forma Balance Sheet
                    As of September 30, 1998
                                
                                           Pro Forma
                                Historical  Entries  Pro Forma
                               ----------- --------------------

Assets

Current assets
 Cash and cash equivalents     $  38,473 $95,201  (a)$133,674
 Other receivable                167,650              167,650
                               ---------            ---------
                                 206,123              301,324
     Total current assets      ---------            ---------

Oil and gas properties - using the
 full cost method of accounting         4,016,945 (95,201)(a)
3,921,744
  Less accumulated depreciation,
   depletion and amortization  3,005,196            3,005,196
                               ---------            ---------
     Net oil and gas properties          1,011,749
916,548
                               ---------            ---------
                               $1,217,872           $1,217,872
                               =========            =========

Liabilities and Partners' Equity

Current liability
 Distribution payable          $      50            $      50
 Payable to Managing General Partner103,682           103,682
                               ---------            ---------
     Total current liabilities   103,732              103,732
                               ---------            ---------

Partners' equity
 General partners               (39,224)             (39,224)
 Limited partners              1,153,364            1,153,364
                               ---------            ---------
     Total partners' equity    1,114,140            1,114,140
                               ---------            ---------
                               $1,217,872           $1,217,872
                               =========            =========











     See accompanying notes to unaudited pro forma financial
                           statements.


     Southwest Royalties Institutional Income Fund X-B, L.P.
                                
           Unaudited Pro Forma Statement of Operations
              Nine months ended September 30, 1998
                                
                                             Assets
                                Historical    Sold   Pro Forma
                               ----------- --------------------

Revenues

Income  from net profits interests      $ (31,967) $   (7,740)(b)
$ (24,227)
Interest                           1,189       -        1,189
                                 -------  ------      -------
                                (30,778)  (7,740)    (23,038)
                                 -------  ------      -------

Expenses

General and administrative        71,241       -       71,241
Depreciation, depletion and
 amortization                    101,000  (19,000)(c)  82,000
Provision for impairment of
 oil and gas properties           51,105       -       51,105
                                 -------  ------      -------
                                         223,346         (19,000)
204,346
                                 -------  ------      -------
Net    loss                         $(254,124)        $    26,740
$ (227,384)
                                 =======  ======      =======

Net loss allocated to:

 Managing General Partner      $ (9,182)             $(8,485)
                                 =======              =======
 General Partner               $ (1,020)             $  (943)
                                 =======              =======
 Limited Partners              $(243,922)            $(217,956)
                                 =======              =======
  Per limited partner unit     $  (21.82)            $ (19.49)
                                 =======              =======

















     See accompanying notes to unaudited pro forma financial
                           statements


     Southwest Royalties Institutional Income Fund X-B, L.P.
                                
           Unaudited Pro Forma Statement of Operations
              For the year ended December 31, 1997
                                
                                             Assets
                                Historical    Sold   Pro Forma
                               ----------- --------------------

Revenues

Income  from  net profits interests      $ 530,113$  (60,989)(b)$
469,124
Interest                           4,876        -       4,876
                                 -------  -------     -------
                                         534,989         (60,989)
474,000
                                 -------  -------     -------

Expenses

General and administrative        80,881        -      80,881
Depreciation, depletion and
 Amortization                    198,000  (27,000)(c) 171,000
                                 -------  -------     -------
                                         278,881         (27,000)
251,881
                                 -------  -------     -------
Net  income                      $ 256,108  $(33,989)           $
222,119
                                 =======  =======     =======

Net income allocated to:

 Managing General Partner      $  40,870             $ 35,381
                                 =======              =======
 General Partner               $   4,541             $  3,931
                                 =======              =======
 Limited Partners              $ 210,697             $182,807
                                 =======              =======
  Per limited partner unit     $   18.84             $  16.35
                                 =======              =======

















     See accompanying notes to unaudited pro forma financial
                           statements



     Southwest Royalties Institutional Income Fund X-B, L.P.

        Notes to Unaudited Pro Forma Financial Statements
            December 31, 1997 and September 30, 1998

Note 1: Basis of Presentation

      The  accompanying unaudited pro forma financial information
of  Southwest Royalties Institutional Income Fund X-B, L.P.  (the
"Registrant")  is presented to reflect the sale of  oil  and  gas
properties  to  Parks & Luttrell, Inc. on October 15,  1998  (the
"Assets  Sold").   The  unaudited  pro  forma  balance  sheet  is
presented  as if the Assets Sold occurred at September  30,  1998
and   the  unaudited  pro  forma  statements  of  operations  are
presented  as if the sale of the Assets Sold occurred on  January
1, 1997.

     Historical - Represents the Registrant's balance sheet as of
     September  30,  1998  and  the  Registrant's  statements  of
     operations for the nine months ended September 30, 1998  and
     the year ended December 31, 1997.

     Assets  Sold  - Reflects the results of operations  for  the
     nine  months  ended September 30, 1998 and  the  year  ended
     December  31, 1997 from the oil and gas properties prior  to
     the sale in 1998.

Note 2: Pro Forma Entries

     (a) To  record  the sale of the Assets Sold as if such  sale
         had  occurred on September 30, 1998.  The aggregate cash
         proceeds  of $95,201 were initially utilized to increase
         cash   and   cash  equivalents  and  will  be  partially
         distributed to the partners.

     (b)  Reflects gross oil and gas sales net of lease operating cost
         and production taxes for the Assets Sold for the periods
         represented.
     
         (c)Depletion for the periods represented was  calculated
         for  the  Assets Sold under the units of revenue method.
         Under   the  units  of  revenue  method,  depletion   is
         computed  on  the basis of current gross  revenues  from
         production  in relation to future gross revenues,  based
         on  current prices, from estimated production of  proved
         oil and gas reserves.

Note 3: Oil and Gas Information

      The  following unaudited pro forma supplemental information
regarding  the  oil  and  gas activities  of  the  Registrant  is
presented pursuant to the disclosure requirements promulgated  by
the Securities and Exchange Commission and Statement of Financial
Accounting  Standard  No.  69, "Disclosures  About  Oil  and  Gas
Producing   Activities".    The  pro   forma   combined   reserve
information  is presented as if the sale of the Assets  Sold  had
occurred on January 1, 1997.  Information for oil is presented in
barrels (bbls) and for gas in thousands of cubic feet (Mcf).

       The  Registrant  emphasizes  that  reserve  estimates  are
inherently  imprecise and subject to revision.  Accordingly,  the
estimates  are expected to change, as future information  becomes
available.







     Southwest Royalties Institutional Income Fund X-B, L.P.

        Notes to Unaudited Pro Forma Financial Statements
            December 31, 1997 and September 30, 1998

Note 3: Oil and Gas Information - continued

     Set forth below is a pro forma summary of the changes in the
net  quantities  of  oil  and gas reserves  for  the  year  ended
December 31, 1997.

                                      Oil (bbls)    Gas (Mcf)
                                      ----------    ---------
     Net proved reserves at January 1, 1997704,000    833,000
      Revisions  of  previous estimates                 (263,000)
(141,000)
     Production                       (51,000)       (68,000)
     Sales                             (5,000)        (1,000)
                                       -------      ---------
     Net proved reserves at December 31, 1997385,000  623,000
                                       =======      =========
     The pro forma estimated present value of future net revenues
of  proved reserves, calculated using December 31, 1997 prices of
$16.88 per barrel of oil and $2.25 per Mcf of gas, discounted  at
10%, was approximately $1,736,817 at December 31, 1997.




                           SIGNATURES


Pursuant  to  the  requirements of Section 13  or  15(d)  of  the
Securities Exchange Act of 1934, the Partnership has duly  caused
this  report  to  be  signed on its behalf  by  the  undersigned,
thereunto duly authorized.

                                                        Southwest
                              Royalties Institutional Income Fund
                              X-B, L.P.



                                                              By:
                                   Southwest Royalties, Inc.
                                   Managing General Partner

                                                              By:
                                   /s/ Bill E. Coggin

- -------------------------

Bill E. Coggin
                                   Vice President


Pursuant  to the requirements of the Securities Exchange  Act  of
1934,  this report has been signed below by the following  person
on  behalf of the Partnership and in the capacity and on the date
indicated.


Date: December 16, 1998            /s/ Bill E. Coggin
                              ----------------------------------
                              Bill E. Coggin, Vice President and
                              Chief Financial Officer