Do you have...

[87s15lt1]

@FUNGC

i dunno if this would help, but the input shaft of the RB20 tranny and the KA/SR tranny should be the same measurements. this is because on KA-T.org, i read a few people running a RB20 twin plate clutch on the KA24DE with a KA tranny. or people even do RB flywheel, and 350z clutch setup on the KA tranny.

so im guessing all those input shafts should be the same measurements. hope this bit of info will help you out.

I’ve read that too. Just, for whatever reason we remember the shaft being bigger.

Find out tonight…if I have the time.