unrestrictedkc

so long story short i started off a few years back with a 2000 civic lx bone stock y7 automatic, i bought a y8 intake mani awhile back to give it a couple extra ponies kept the 3 wire throttle body IAC and life was good, about a year ago i did the 5-speed swap i kept the automatic ECU and lived with the CEL ever since. then a few months back the y7 killed a valve so i swapped in a Y8 (still running the obd2 Y7 auto ECU, no vtec just running it like a y7) now im to the point im going to turbo it. i have everything needed turbo kit, injectors, p28 chipped ECU jumper harness...ect, my questions are:
- do i need to swap the engine wiring harness to the Y8?
- can i still run the throttle body IAC?
- if i can get away with not swapping the harness where do i run my VTEC wires?

i've searched everywhere and so far no luck finding answers