I know the correct bolt is a GM 120677, but does anyone know the length of that bolt? I have a 3/8-24 1-1/4" bolt with a TR head that is too short to engage the compressor threads if the proper thick washer (3706737) is used. Without the thick washer, I get about 1/4" thread engagement so operationally, it's fine, but not "correct." The bolt "kits" don't use the correct washer and seem to use the 1-1/4" bolt...

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