Hello, I am new to posting. Been gathering info from the site for a while, and just now started on my project. 1996 SC SWB 2wd, started as a 5.7/4l60. About to drop my Gen IV 5.3/6L80 into it. I purchased the Schoenfeld coated headers, and took the part numbers that they suggested for the adapter plate, motor mounts, and motor mount pads. Well I just got the stock Clamshells off, and now the Moroso #62610 mounts do not line up with the holes in my frame. Are there multiple frame designs out there? Is it a fluke of wrong part or mismarked part number? The bottom two holes line up, but the single top hole does not. Anybody run into this?

The mounts i purchased were Moroso #62510
Mount Pads- Moroso #62610
Adapter Plate- Trans Dapt #4572

Thanks for any help. Biff