You can NEVER have too good of a ground IMO.
I would add one from the neg. battery terminal/cable to the body,another from the engine to the frame,and another from the engine to the body.
And make sure they all get actual metal to metal contact,paint will inhibit good conductivity.
Have you figured out whats causing your binding issue yet?
__________________
This space for rent... 
In the meantime,check out the cars HERE.
|