FIRST AMENDMENT TO LOAN AND SECURITY AGREEMENT


         This First Amendment to Loan and Security  Agreement (the "Amendment"),
dated as of February  28,  1997,  is made by and between PST Vans,  Inc., a Utah
corporation  ("Borrower"),  and Congress Financial Corporation  (Northwest),  an
Oregon  corporation  ("Lender"),  for the  purpose  of  amending  their Loan and
Security  Agreement  (with  Addendum) dated August 6, 1996, as it has previously
been amended (the "Loan Agreement"). All capitalized terms not otherwise defined
in this Amendment have the meanings given to those terms in the Loan Agreement.

                              TERMS AND CONDITIONS

         For valuable  consideration,  including the mutual  covenants set forth
below, Borrower and Lender have agreed as follows:

         1.       Section  1.17  of  the  Loan  Agreement  is amended to read as
                  follows:

                           "1.17 "Maximum Credit" shall mean the amount of
                  $11,500,000."

         2.       Section  3.5  of the Loan Agreement is amended in its entirety
                  to read as follows:

                           "3.5  Unused Line Fee.  Borrower  shall pay to Lender
                  monthly  an  unused  line fee at a rate  equal to  one-quarter
                  percent (.25%) per annum  calculated  upon the amount by which
                  $9,200,000  exceeds the average daily principal balance of the
                  outstanding    Revolving    Loans   and   Letter   of   Credit
                  Accommodations during the immediately preceding month (or part
                  thereof)  while  this  Agreement  is in effect and for so long
                  thereafter as any of the  Obligations are  outstanding,  which
                  fee  shall  be  payable  on the  first  day of each  month  in
                  arrears."

         3.       For the purpose  of  extending the term of the Loan Agreement,
Section 12.1(a) of the  Agreement  is  hereby amended in its entirety to read as
follows:

                           "(a)  This   Agreement   and  the   other   Financing
                  Agreements  shall become effective as of the date set forth on
                  the first  page  hereof and shall  continue  in full force and
                  effect for a term ending August 31, 1999 (the "Renewal Date"),
                  and from year to year  thereafter,  unless  sooner  terminated
                  pursuant to the terms hereof. Lender or Borrower may terminate
                  this Agreement and the other Financing Agreements effective on
                  the Renewal Date or on the  anniversary of the Renewal Date in
                  any year by  giving  to the other  party at least  sixty  (60)
                  days' prior written notice; provided, that, this Agreement and
                  all   other   Financing    Agreements   must   be   terminated
                  simultaneously.  Upon the  effective  date of  termination  or
                  non-renewal of the Financing Agreements, Borrower shall pay to
                  Lender,  in full, all outstanding  and unpaid  Obligations and
                  shall  furnish  cash  collateral  to Lender in such amounts as
                  Lender  determines are  reasonably  necessary to secure Lender
                  






                  from loss, cost,  damage  or  expense,   including  attorneys'
                  fees  and  legal expenses, in connection with  any  contingent
                  Obligations, including issued and outstanding Letter of Credit
                  Accommodations  and  checks  or other  payments  provisionally
                  credited to the Obligations  and/or as to which Lender has not
                  yet  received  final  and  indefeasible   payment.  Such  cash
                  collateral shall be remitted by wire transfer in federal funds
                  to  such  bank  account  of  Lender  as  Lender  may,  in  its
                  discretion, designate in writing to Borrower for such purpose.
                  Interest  shall be due until and  including  the next business
                  day, if the  amounts so paid by  Borrower to the bank  account
                  designated  by Lender are received in such bank account  later
                  than 12:00 noon, Pacific time."

         4.       Section 12.1(c) of the Agreement is amended in its entirety to
read as follows:

                           "(c) If for any reason this  Agreement is  terminated
                  prior to the end of the then current term or any renewal term,
                  in  view  of the  impracticality  and  extreme  difficulty  of
                  ascertaining  actual  damages and by mutual  agreement  of the
                  parties  as  to a  reasonable  calculation  of  Lender's  lost
                  profits as a result thereof, Borrower agrees to pay to Lender,
                  upon  the  effective  date  of  such  termination,   an  early
                  termination  fee  in  the  amount  set  forth  below  if  such
                  termination is effective in the period indicated:

                                    Amount                Period

                  (i)      3% of Maximum Credit   from the date hereof to and
                                                  including August 6, 1997

                  (ii)     1% of Maximum Credit   any time after August 6, 1997

                  provided,  however,  that if this  Agreement is terminated and
                  the  Obligations  satisfied  in full after August 6, 1997 from
                  proceeds of new  financing  provided to Borrower by CoreStates
                  Bank,  N.A., no early  termination fee shall be payable.  Such
                  early  termination  fee shall be  presumed to be the amount of
                  damages  sustained  by  Lender  as  a  result  of  such  early
                  termination,  and Borrower agrees that it is reasonable  under
                  the circumstances  currently  existing.  The early termination
                  fee provided for in this Section 12.1 shall be deemed included
                  in the Obligations."

         5.       For the accommodations reflected in this  Amendment,  Borrower
agrees to pay Lender a fee in the sum of $35,000.

         6.       To induce Lender to accept this Amendment,  Borrower makes the
following representations, warranties and covenants:

                  (a)      Each and every recital,  representation  and warranty
contained in the  Agreement is correct as of the date of this Amendment.


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                  (b) No event has occurred or is continuing  which  constitutes
         or would,  with the giving of  notice,  the  passage of time,  or both,
         constitute an Event of Default under the Agreement.

                  (c) There has been no material  adverse  change in  Borrower's
         business  or  financial  condition  or  prospects  since  the  date  of
         Borrower's most recent audited annual financial  statement furnished to
         Lender.

                  (d) Borrower shall pay all expenses,  including attorney fees,
         with Lender incurs in connection with the preparation of this Amendment
         and any related documents.

         7. Except as specifically provided above, the Agreement and all related
agreements  and  documents  shall remain fully  valid,  binding and  enforceable
according to their terms.

         BORROWER:                         PST VANS, INC.

                                           By        /s/
                                               ---------------------------------
                                           Title   Chief Financial Officer
                                                  ------------------------------

         LENDER:                           CONGRESS FINANCIAL CORPORATION
                                           (NORTHWEST)

                                           By        /s/
                                               ---------------------------------
                                           Title   Vice President
                                                  ------------------------------

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