Good video by @318willrun

I’m curious if you measured how far below deck the pistons are and if you measured the dish depth. Dish diameter is 3.13 on everything I’ve measured myself and checked out in catalogs. The depth on most re-man pistons runs between 050-.0705, but I’ve seen factory depth close to .080 + or minus .005. Yours look to be .050 deep @ 6.3 cc’s of volume, and the .0705 deep dish has a volume of 8.9 cc’s. Those Felpro 8553PT gaskets usually have a compressed thickness of .051 for an 11.6 cc volume.