Any info helps especially if someone has done this before but I have a 1991 Camaro rs that had a 305 cid tbi motor in it and I’m putting a 305 tbi motor from a 1989 rs and everything seems to be the same mainly other then some of the plugs from the harness on my 1991 don’t match with the plugs on the 1989 motor so I’m just curious what I should do or if there might be any issues

 

Use everything off the 91 and you should be fine.