86Formula/Iroc

I am swapping my 305 TPI for a 355 and I was wondering what I do with the wiring harness because I want the engine bay as clean as possible with no access tubes and wires. Can I still use my 700r4 and just buy a manual valve body and what would I do about the shifter since I want to keep it automatic looking with the same shifter if that's possible. How would I lock up the torque converter. Would all my gauges work still like voltage, rpm and feul? Can I still use my stock fuel pump and how would I make it work for the carb? I was thinking about just wiring my fans to a switch and turning them on when I start the car. Any other information on this swap would be much apprecieted.
~Thanks

86Formula/Iroc

Or would it be better to just put the heads and tpi on the 355 and just go like that I do realize that it will be no drag racing machine and that is what I do with it so maybe I shouldn't do that

86Formula/Iroc

Or would it be better to just put the tpi and heads off the 305 and but them on the 355. I do know that the heads are probably smaller on the 305 and that will be no good as a drag racer unless someone has done this before and can tell that the car is fine with the 305 heads. but I do use it as a drag racer so any advice will be greatly appreciated

Jacobaxeman