427 oil filler cap

[Tony C.]

Hi guys
I need help with a 427 valve cover oil filler cap some have a large swooping S in the center and some have a S that looks more squared off like a Swastika all most what is the the difference.
Thanks Tony

[Steve B.]

Re: 427 oil filler cap

Tony, I asked this question recently and the answer I got was that the squared S was used in 65 to early 67 BBs with the swooping S used after that. Hope this helps.

[Peter K.]

Re: 427 oil filler cap

Anybody know around when the Square S to the Swooping S was used?? My car's build date is 11/3/66 car number 2931 want to make sure I have the correct one.