First of all, i know the solution might be somewhere in this forum or somewhere else on internet but i'm lost under the tons of informations.
I have a 4 speed 240z original transmission 71A in 3 parts and straight shifter. (My 240z is a serie 1, Dec 1970)
I'd like to swap it to a 5 speed transmission.
I have sourced a RB20 and a RB25DET transmission because my first plan was to do a RB26 swap but i got a bad engine so i change my plans and go for a L stroker.
My question is, can i use the 71A 4 speed bellhouse on the RB20 box (or the RB25DET box but i guess it's now too heavy for the stroker setup)
Or do i have to source a more recent L-series 5 speed transmission (71B) ?
I have access to a machine shop for any bellhouse modifications.
Thanks for your time and help.