ok so im pulling the motor out of an 89 s5, its an s4 as far as i know, my car is an s4
what are my options for making it work?
all i found so far is swap all the manifolds and use s4 harness, ecu etc?
or swap s5 harness and comp and use the s5 mani's
anything else im missing?
my shell has no harness so i can use the s4 harness and mani's from my s4 parts car or should i just pull the s5 harness and use that computer?
is the swap of harneses and ecu's plug and play?
thanks in advance