1970 GTO Judge Original Radiator Cap
 

I’ve been looking for the “correct” radiator cap for our 1970 Judge. I’ve seen the following;

- Right turn at the top of the cap
- Never open hot at the top of cap
- Dimpled rivet
- Non dimpled
- Large ears
- Small ears
- Zinc
- Stainless steel

Does anybody know what’s “correct” /original?

Thank you