So i just got a free 90 gtu with a t2 motor out of a 87 with the harness and ecu, it was free cause the stock motor is seized, and the t2 was just free lol. So my question is do i have to swap the dash harness from a s5 to s4 to run with the motor.

 

no

 

Im selling my S4 to buy a S5 and turbo it so is it pretty much plug and play? T2 harness, ecu and cluster and good to go. As far as electrical

 

is not plug and play,is not hard but you have 2 know what is needed.