I am doing a TII conversion on my 91 n/a. i have a complete s4 doaner. I'm not so sure about the wiring. some ppl have told me that i will have to rewire the dash. some say i wont. I would really like to know what i'm up against. most ppl do s4 -> s5. any comments on anything would be great. thanks

btw: no i haven't taken a look at it my self. the car isn't at my house right now as i still need to pay for it.

 

It's much easier to use the same series. By not using the same series you open all kinds of cans of worms.

Like the electrical OMP and other S5 parts that will not work with a S4 motor without modification.