Originally Posted by Lugnutz
The last pic shows that the depth of an S10 bell and a factory 1960’s C10 cast iron bell are identical. So the location of the end of the crankshaft in an S10 four or six cylinder engine must be the reason for the longer input shaft.

The S10 T5 transmission was used behind the 2.8 V6 which has a deeper pilot hole in the rear of the crankshaft & longer pilot bushing than Chevy inline & V8 engines.
I shorten the input shaft & front bearing retainer collar, shorten clutch hub on flywheel side.

BC
1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022