Picture of bolt head. Might take longer for details
Cool, thanks! I see blue paint on the cable, which means the bolt used to have blue paint on it also. Looks like there were three identical 5/16-18 x 5/8 "E" bolts on the 69 340: R rear head to firewall ground, L front head to neg batt ground, and rear bolt on coil strap.
On your 69 GTS 340 Dart, I'd love to see good photos of the distributor clamp and the distributor.
Distributor clamp: It's well established these were copper plated, but I strongly suspect they were black in appearance due to a chemical process (hot alkaline dip?) known as copper blackening. I've never found any discussion about black clamps. Is your clamp black colored or copper colored? Warning - the blackened surface may be very thin and easily removed down to copper plating by mild abrasive scrubbing.
Distributor body: Is it a black painted iron casting? What is on the aluminum tag, and were tags different for manual and auto transmissions? I'd like to see a good photo of an original 69 340 4-speed tag.
If you don't see two dolphins, you need a vacation.
