EXHIBIT 99.1

                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER

         I, Lamar Norsworthy, Chairman of the Board and Chief Executive Officer
of Holly Corporation (the "Company") hereby certify, pursuant to Section 906 of
the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350 (the "Act"), that based
on my knowledge:

         1. The Company's Annual Report on Form 10-K/A for the year ended July
         31, 2002 (the "Report") to which this statement is attached fully
         complies with the requirements of Section 13(a) or 15(d) of the
         Securities Exchange Act of 1934, as amended; and

         2. The information contained in the Report fairly presents, in all
         material respects, the financial condition and results of operations of
         the Company.

Date: September 8, 2003                         /s/ LAMAR NORSWORTHY
                                                -------------------------------
                                                Lamar Norsworthy
                                                Chairman of the Board and Chief
                                                Executive Officer

         The foregoing Certification is being furnished solely pursuant to 18
U.S.C. Section 1350 and is not being filed as part of the Report or as a
separate disclosure document for purposes of Section 18 of the Securities
Exchange Act of 1934, as amended, or otherwise.