My friend has a 350 in a 51 Chevy that has multiport FI that he says was on a Corvette. I'm trying to order a wiring harness and apparently there are 2 different ones depending on the year of the injection system. How can I tell what year it is? I've looked for a number on the thing and not sure where to look. It ahs been running before and just quit. Whoever installed his wiring harness was a butcher and he has no power in one section of the fuse panel. I think replacing the harness and doing a clean install would be easier that patching it. Looks like a fire hazard on a $120,000 car