Radiator Cap Restoration

[RPOLS3]

Originally Posted by 69 Post Sedan

Also, the rivet and the underside are very different. Can someone explain why? Are they from different years….?

I often wondered what years the various rivet designs were correct for as well - any sources for this information?

Google search produced this information from 2006 sYc thread - not sure if correct?

https://www.yenko.net/forum/showthread.php?t=88323

2 circles flat rivet. (1968L - 1972)
2 circles hollow rivet. (1966 - 1968)
No circles hollow rivet. (1964 - 1966E)