Quote: Chassis being a factory production chassis and frame being a tube frame as in fabricated car?
From what you are saying I call it backwards then... when I say a chassis car.. thats meaning a tube chassis car.. frame as in a production car... I do ground the heads to the chassis but I use the chassis as the ground link... so far I've never had a problem.. I always looked at it like.. if you roll that .083 tubing into a solid roll its greater than the 1/2" ground cable... and thats just one side of the chassis... electricity will always travel the easiest way(least resistance)