M4A2 Sherman clutch shim question

[Malcolm Towrie]

I have to confess, guys, since we removed a total of 0.020” total from both the flywheel and pressure plates to clean up the heat checking, I decided to install both clutches with just the one 0.032” shim per bolt. My justification is that my experience working on GM engines and transmissions is that the design engineers were way too anal about setting allowable specs and wear tolerances. I defy anyone to notice any difference between a 6-71 running with spec 0.016” valve clearance (4 valve head) and say 0.018” clearance.
Also the GM spec of 1.460” for the injector timing, with no tolerance specified, has at least one guy on YouTube making the effort to get it that exact spec, I seriously doubt if +/-0.010” makes an detectable difference.
If we find out I’m wrong on the shims when we get the engines back in the Sherman, I will of course not be posting it here.
Malcolm