FCBO Gold Member
- Jan 20, 2023
- Reaction score
Ill get a better picture tomorrow. My '69 definitely has a firewall ground.That’s your oil pressure sender wiring.
In my research 1969 and older cars have a firewall to engine ground and a battery cable. The way I understand it is the engine ground is the battery, and the body ground is the engine.
1970 and up have no firewall to engine ground and a small additional body ground at the battery that replaces the ground that would be at the back of the engine.