I need an engine and I ranj across a S5 engine, tranny, wiring harness, and ecu cheap, what else do i need to do to put this in?

 

an 87 engine is s4 not s5.

 

yeah, I am well aware of that............. The thing is i can get a S5 engine from a friend cheaper then i can find an S4 engine..... So the question is what else do I need to put this engine in my car other then the Engine, Tranny, ECU, Wiring harness, the AFM..... What else is needed to put this in? What special things need to happen.......

 

i belive the dash harness is different