hello good people.
i have a rx4 12a 5 speed gearbox, will a 13b hook up to it? or even a 12a single dizzy engine? my engine is a twin dizzy but i want to use the 12a twin dizzy gearbox. is there any difference?

regards

 

yes. the bolt pattern for the bellhousing to rear plate r all the same. except maybe those with top mount starter. never owned on so can't be for sure.

 

ahh **** mine is top starter so i guess i cant use the gearbox then ! :-8

 

Why not just use the matching flywheel and starter? You'll just have to be sure to use a counterweight that matches the rotors. I don't know how it is for RX-4s and 1st gen RX-7s, but 2nd gen RX-7 flywheels have integrated rear counterweights (manual trans), and automatics have a removable counterweight that is useful for aftermarket light flywheel balancing. For instance, to use a TII transmission on an NA 13b engine, the TII flywheel and starter are used. If your starter wiring isn't long enough, you could run new cables.