Rx7 related, sorta
 

i have an 88 glx i bought with an s5 tii swap, but i dont know if i want to put that engine in that car...

i also happen to have a 91 miata that has some body damage...

see where this is going?

i only know of a couple successful 13b swaps in miatas but i want to perform one.

i have:
s5tii engine/tran with engine side harness, a used s5tii computer that says Rmagic on it, the rear diff to swap into the miata, certified welder (thats me), and weekends off from work haha.

my biggest question is of course, electrical wiring. i want to just run the kouki with stock power with a stock ecu, in theory could i just get the in dash car side harness and plug the engine harness into to, run power and start it? does it have to be a tii s5 harness or can it be an s5 na harness? this is the part i am lost on, please help with minimal bashing haha