Join Date: Mar 2002
Location: Austin, TX, USA
Re: Engine ground to chrome fuel pump plate vs. alum. head
The only grounds you must have are A) the primary ground to the block, and B) the ground to the right fender. All other ground straps etc. were added by GM to try and keep radio noise under control - especially with AM radio. The primary ground to the block feeds the starter motor (highest load), and provides a return path for the ignition system (noisey). The fender ground is a return for just about everything else - lights, gauges, accessories...
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI