SR Bellhousing Bolt Pattern vs. L20B

[Rev_D21]

Can anyone tell me how different the RWD SR 5-speed bellhousing is from an L20B 5-speed? Does it require the use of an SR transmission or can an old Datsun competition transmission still be used after the swap?

[Hijacker]

With an adapter plate, you could use the L20B trans. The bolt pattern between the block and the bellhousing are pretty different, if I remember correctly. I would see about having someone mill up an adapter if you really need to use the comp trans.

[Rev_D21]

Thanks for the info. The owner really wants to use the Datsun transmission because it has a 1:1 5th gear and he's doing land speed stuff.