I am putting the finishing touches on my engine. My car is a 1969 RS/SS 350 (L48 engine) convertible with a THM350 (M38). While going through the boxes of my original engine parts I put up several years ago, I found two oil caps. They are both "S" caps but the designs are a little different. I have stripped the paint off them and would like to know which cap is correct (if any). I have searched this forum but did not find a definitive answer. Any help would be appreciated. I know there are a lot of very knowledgeable people on this site and I would really like to hear from you. Thanks.