I'm trying to figure out which way I want to go about this conversion from my K10 that was originally a 6.2 Diesel Truck. It looks like the underhood harness is way to short and been buthered all to hell. Sooo I'm going to have to find an underhood harness for this truck. I do aslo have that 85 C20 cab that has all it's wiring still in it. Of course I have that underhood harness but it's been cut in half so I'd have to splice all those wires together to use it. I think I'd rather just use a complete harness that doesn't need spliced. The BIG QUESTION is, and asking for opinions.... How much different is the underhood wiring on a 6.2 Diesel to a Gas engine. I'm aware of the controller for the glow plugs etc. It's my understanding the ignition wire on a Diesel went to the injector pump and you just move it to the coil on a gas engine. That part is easy enough. But I think I want a proper gas conversion. Does anyone if I was to find a Gas truck underhood harness, will it work plug and play just to plug it in on the firewall and the pinout knows where everything should go like AC, gauges, igntion power to the coil etc? If I want it to be a true gas truck should I swap fuse blocks and all from the 85 C20 gas truck and put it in the 85 K10 Diesel truck? Seems like that would be a ton of work.