Tom,
But that is a picture of the front horns, I've never a 61 frame that didnt look like that in the front. The rear is where ive noticed the big difference. The white 61 SS that I owned had the square tubing behind the rear axle, prettist thing Ive seen as there no welds. I wish i had a photo of it, at first i thought it was becase the car was a Super Sport but i quickly learned that the fact that it was an SS had nothing to do it when i saw a 4 door hardtop with the same frame. I think those two cars may be the only tube frame cars ive seen. The blue SS that Robert has now has has the C frame. Great discussion. BTW, the two cars that i have seen with the square tube frames were Atlanta built cars