Chicken manure will smother fire in emergency.
I'm sure it will, but the smell will kill you!
Slowrider, that's the worst I've heard about that didn't go up in smoke. Count yourself lucky you still have a truck. I'm assuming you were running the original cloth covered wiring. Time for a new harness, and replace all the grommets, too. If I were doing the work, I would opt for a harness with a fuse block, these trucks were really lacking in that department.