swaping a tpi 305 from my totaled 86 iroc into my 89 firebird formula 305 tbi. i dont want to use the harness from my iroc cause its to ripped up from the crash (i REALLY got wacked) i got a painless extra length harness to do the job. what i need to know is what do i need if anything from behind the dash, besides the computer. do i need any of the ignition wires or the fuse board.