Tee hee, just fitted new EA71 for my '78 DL Sedan and just plugging everything back up and I've forgotten where the battery earth was.  On the block or the car?  Where abouts?

 

Silly question I know...

If you mean the wire apart from the main lines (comes straight from the battery terminal). In my EA71 it goes to the valve cover bolt. That small wire is only for grounding the engine.

Large wire to the engine block just above the right hand side valve cover, small wire goes to the chassis

Here is a pic for the block ground

I replaced the original with a #4 AWG welding lead and it seems to like it better.

Sweet! Thanks very much for your help.