i have a 91 da integra all stock with a 18a1 i have exhaust and intake but im looking to swap a cute little gsr in there im wondering what kind of wiring issues will i run into or is it direct? will the engine harness work with my cabin harness? im going to upgrade to either a p28 or p30 ecu before swap

 

gsr's are cute?? give me a break.. do research but it sounds like you dont have enough knowledge to do this yourself so just pay somebody to do your "cute" motor swap.

 

knock sensor vtec o2 i think that would be it

 

its not that simple dude.