Jim,
Obviously, it doesn't hurt to have more ground straps, but the original question refers to "when it was driven off the assembly line."
Based on the FAM and AIM, I believe that the number of flat braded ground straps is
two without a radio, and
three with a radio, not four.
1 Flat Ground strap for battery.
1 Flat Ground strap for passenger side of engine.
1 Flat Ground strap for Radio, valve cover to fender support arm/brace at fire wall.
A total of 3 Flat Ground straps.
The grounding strap in the diagram in Section 12, Sheet 7.01 is for a
Righthand Drive truck. The caption below the diagram states "3000-4000-6000
RD."
> Sect 12, Sheet 7.01The notation by the arrow pointing to the engine ground strap on Section 0, Sheet 1.00 "ELECTRICAL & INSTUMENT INSTRUCTION INDEX" shows the location of Lefthand Drive diagrams and Righthand Drive diagrams ...
> ENGINE GROUND STRAP INSTRUCTION
LD SECTION 12 SHEET 8.00
RD SECTION 12 SHEET 7.01
If you are asking about stacking two engine ground straps on the passenger side of Hydramatic trucks - one as shown for manual transmission and one as shown for Hydramatic transmissions ...
The engine ground strap for manual trannys attaches under a bolt that holds the bracket for the "stomp" starter pedal assembly. There is no starter pedal assembly on HD trucks. So there is still only one engine ground strap as shown in the Hydramatic diagram.
- Lonnie