I've got an early redtop turbo engine, and possibly a late loom or something? the connectors for the iac valve and the knock sensor are both square types but the one on my loom is round? the round one is black and the other is red which i think goes to the iac valve, is this right? if so i need to change the round connector for a square one for the knock sensor? is this right, i'm well confused?!