47 V8 ignition mystery

[Old Henry]

Originally Posted by Terry,OH

Does your engine have a heavy battery ground cable bolted to one of the head studs?

Originally Posted by deuce_roadster

I would also double check the ground of the engine to insure it was clean and tight clear to the battery. If loose and dirty, it might fail as the engine heats up.
An old timer once told me that all electrical troubleshooting begins with and at the battery.

Engine is well grounded with webbed ground cable from head bolt to firewall within a foot of the same style ground cable from battery post to firewall. Starter motor works fine so ground not the problem.