the Little Rascals did a show where they chopped up string and grated the old sunlight soap for cheese to make some money on the side.. your wiring reminded me of that ....
oh yeah and my old Desoto, US export version Plymouth Cranbrook body..
i rewired that old girl , was 2 weeks work at nights and looked like that .. i stripped trailer 7 core to its individual wires.. all i could think of when the horns started blaring was Christine's Aunty (thanks Stephen King), turned out the horn wire had warmed near the exhaust manifold.. im thinking the fan helped blow the wire on to the pipe where the coating melted and earthed...
sigh... good times ..
LOVE your work !
this isnt mine , was the same tho