B18 wiring

i am swapping in a 1st Gen Ls soon but what wiring is needed besides extending IAC and TPS ect...? already MPFI using Si harness.

i just got mine all wired yesterday and i didnt have to extend anything at all(same swap b18a into si) its been really easy so far just put the harness on if it dont fit extend it. wiring has actually been the easiest i have one extra white plug that doesnt have anything to go to on the b18. ive heard that everyone has that plug so im not gonna worry about it