Swapping

[AUV]

Good morning

I'm looking to swap from a rotary drive-line to 4A-** drive-line in my 1983 RX7, so I've started reading up on the 4A-GE.

I can get an 8 valve AE86 very cheap, BUT can I use the engine and transmission as a template for making my front and rear sub-frame? Does the 4V AE86 motor and transmission bolts up the same as the 16V 4A-** motor and transmission?

Thanks,
Vin
p.s. Any suggestions on a final 4A variant? I want the lightest engine and transmission possible and would like 120 ft-lb at the crank.