Originally Posted by Pre '68 Dave
A person always needs to bolt the transmission in place with only the disc to be sure it is not being pushed against the flywheel.
I almost always drill about 1/8" of splines from the rear side of the disc with a 1" drill to prevent this from happening.
Some discs work fine without modifying.

^^^^^ That is excellent advice. ^^^^^

1965 Chevy C10 Shortbed 1/2-Ton Stepside
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