The stock RX-7 12A and stock 13B GSLSE engine mounts look the same to me. It is the crossmember that is different. Also that picture is not a stock SE mount but the RB modified one.

 

DirectFreak is correct.
Personal slotting the cross brace is not a big deal, the reason its 20mm is because that is how much longer the 13b engine is over a 12a (10mm per rotor housing)

The swap is not rocket sceince.

BTW if you are using a carburetor instead of fuel injection, use a 12a front cover and sell the 13b cover for about $50. Reason is because of the 12a OMP is 2 outlets and the 13b OMP is 4 outlets. RIGHT?

If you dont have a 13b GSL-SE cross brace I will sell you one for $50.

JOhn

 

I unbolted the motor mounts from the chassis, drilled 2 new holes 20mm closer to the front of the car, reinstalled the motor motor mounts, and then installed the engine (in my case a 4 port 13B). No modification to the cross brace necessary.

 

My mistake, I ment the Front Engine Mount , not the cross brace.


John