What does it take to swap a 2nd gen 13B into a 1st gen 12A '83 chassis? I race IT7 and need to investigate alternative engines since the 12A housing is NLA.

Thanks,

Tom

 

racing beat has a mount kit for this swap.

 

Im doing a 13b swap in mine right now, you need a gsl-se front cover and oil pan. The second gen motors mount from the center housing, a gsl-se front cover allows you to mount the motor in the fb chassis I simplified this whole transplant by getting a gsl-se 13b and putting it together with my 12a side housings that i streetported to make a 4 port 13b like mazda used in the 70's. If you get the gsl-se motor you can use the front mount oil cooler as well, if you havent already done that. The only aftermarket part you will need is this http://www.racingbeat.com/FRmazda1.htm You could probably fabricate one if you have the equipment.

 

https://www.rx7club.com/1st-generation-specific-1979-1985-18/please-help-12a-13b-swap-85-gs-559274/

there are many threads on this, one above and search for the rest. :-)