The front & rear clutches are also different thickness....but I can never remember which set goes where. I usually just fit them into the drum and check the clearances. If they're good, then it's good. Otherwise I flip them and re-check. I don't know that I've seen different steel widths, usually the stack height difference is accounted for with a set of selective snap rings.
FYI the big thick one is the pressure plate.
Yep, I was careful to set the 2 different clutches in different stacks so I wouldn’t accidentally mix them up. Aside from the difference in thickness I noticed the ones for the rear also had a gap on the inside where a tooth was missing on each one. Check out the attached pics, they are the exact same except in the thickness. I went back to where I bought them and then I realized there were 2 different sizes, but the ones that are the right thickness have notches on the gears, it’s strange
