Okay. Right now my TS is electrically a 3 plug N/A car. 3 pin TPS, 4 pin MAF, wasted spark, etc. For my project I want to use the bulkhead harness in the engine bay and the bulkhead harness in the cabin and the engine harness from a 4 plug WRX wiring but retain the dash, rear harness and front engine bay harness from the TS. I\'ll add pictures of the harnesses I wish to replace.
This one...
and this one
The question is, how compatible are they going to be with the dash, front engine bay and rear harnesses from the Legacy?
PS, I know I\'m an idiot and/or a fool for still undertaking this and I know it will be probably less hassle to get a WRX/BC5/single conversion/3 plug turbo so on and so forth. But I have an ECU with a chip that has "Group N" written on it and I\'ll be damned if I don\'t get to try it out.
TL;DR converting a 3 plug N/A Legacy into a 4 plug single turbo by replacing cabin/engine bay bulkhead harness and engine harness.