hi all im having a hard time locating some 12a rotor housings , i was wondering if i can use 13b and is the conversion to hard to try? i can get a new/used 13b for cheap , but i dont wanna use injectors , is this posible? any advice would help i dont know much about the rotarys yet thanks

 

Please pardon my self promotion, but I have a set of very good used 12A housings for sale in the classified section:

https://www.rx7club.com/1st-generation-rx-7-1979-1985-parts-101/12a-rotor-housings-944901/

As far as putting carbs on a 13B - yes, you can do that. Check out Mazdatrix.com and racingbeat.com for carb and manifold options for all 13B variations.

I am selling off all of my 12A stuff to pay for a 13B swap because recent rules changes in SCCA clubracing makes running a 13B too much of an over-dog to ignore.

 

Tons of information already out there, you've just got to search for it. Short answer: it's a brain-dead easy swap if you use a carb.