Help needed to identify these headers

Seller says they're 2" pri & 3" collectors, mid-60's design. I contacted him & he says number on flange is 5202 but doesn't know more than that. I called Holley (who now owns Hooker) & tech said his records only go back to early 90's. Anyone know what these are & what they fit?
https://www.ebay.com/itm/275547898178?hash=item4027ef4142