Need 4-speed Help

JohnRR - Thanks for the suggestion. I think one other members made a similar suggestion. Don't have never seen or used a dial indicator, but should be able to figure it out... What I can't envision is how to center the dial indicator on the crank? I'm assuming there's a magnetic end on the instrument and it has to be centered on the crank to get an accurate reading on the SS opening circumference. Hmm, will see if I can locate one and maybe it will make sense if I see the tool.

In the meantime, maybe when I pull the trans, I'll use a dummy input shaft, stick it in the clutch plate splines, pilot pushing, and take measurments from the outer diameter of the output shaft to the SS opening at 4-5 points... Will do this before pulling the SS and flywheel... I have a 3-speed trans on the side of the house I was going to toss and now maybe I'll diasassemble it for spare parts. Assuming the input shaft between a 3 and 4 speed are the same?