I know this has been covered plenty of times but I couldn't find the answers I was looking for so here we go

I have the option of buying a 2000 si engine with full harness mounts dizzy basicly everything required for the swap my question is on wiring is the si harness plug and play into ex cabin wiring minus jumper to make it obd2b? I've worked on motor swaps but shy away from wiring so any info would be a lot of help