Hello,
I have a 55.2 Chevy truck with a late model wiring harness. I'm new to electrical wiring. I have a question about grounding. Is there any benefit to routing ground wires from various components through the firewall and making one connection that has a strap to the negative battery terminal? Another words a direct connection rather than using the body to ground. Even though I have the cab, frame and engine directly grounded via straps. You can see how I have it with the diagram link below.
Electrical diagram