It might be the 88-92 new body truckring not the old body 73-91.
When you pull the carpet up on a auto trans truck and expose the sheetmetal trans hump you will find not only the jute/pad cut out hole is oval shaped but that there are 7 dimples in the hump, 1 center line of hole, 6 for the trim screws. 73-87/91 465 is oval.