LOL ------ I have custom made stainless steel big tube headers on the '65 Mustang track car --- I've never changed the plugs on the car... I wait until the end of each season and they pull the motor to refresh it.....
I hooked up the battery in the trunk (I still need to hook up the ground cable to the engine) to see what works. The Ron Francis trunk mounted battery kit has two ground gables one small short one that I have going to the body and a large long one that they want mounted to a bell housing bolt. So far the AC 3 blower speeds work, taillights, turn signals, and headlights.
I have a problem with the lights in the dash flashing when the key is off and the steering column harness is hooked up.
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Rusty Gillis
Gillis Performance Restorations
Port Richey Fl www.gillisrestorations.com