OK, I suspect that the size of the meatballs/rondelles varied somewhat back in the day, but does anyone KNOW the size most commonly used on the 427 comp/sc cars back in the sixties? Was it regulated by SCCA etc, or was there some leeway? Same goes for the numbers, what was the common size used? Was it mandated?
I've seen claims of 16 and 20 inches front and sides, and 17 and 19.
Yes, this is an anal question. But I figure the originality forum is where all you rivet-counting anal guys hang out.
