I'm pretty sure you're talking about the crankshaft position sensor. I'm fairly certain that you won't have spark without that, unless you swap out your distributor and module for an older style, which wouldn't be a bad idea if all your wiring is melted, and you want to eliminate the EFI. That's a pretty big job. If it were up to me, I'd find a wire harness and a fuel line at pick n pull or jeep stuff or wherever you like to get your stuff, and put it back to stock, but then I'm a huge EFI fan. Either that, or find a carbureted jeep, and pull ALOT of parts off of it. There's going to be alot of annoying things that will come up in this job. Best of luck!