[sixtiesmuscle]

I don't mean to disagree with my good friend Belair, but, some clarification is warrented.The Super Duty cars didn't all have aluminum body parts, and there were a relatively large number made. Sure, the "Swiss Cheese" cars [13 I think?] were very special, but, there were lots of 62 & 63 Super Dutys built for street use. I found the quote about a RA IV SD motor very interesting because that is what the Tin Indian has in it, a RAV block, etc., and RAIV Heads. So, maybe there is a correlation between the early SDs and the later "SD's". Both of the RA IV cars I have were built by Pontiac with all the weight saving deletions possible. They were built specifically for racing, and that's all they did.