Can Anyone ID these Vintage B/B Camaro Headers?

[Flying Undertaker]

Warren: Anytime I can help other members, I will try to do my best. The header flange outer shape on your headers are identical to the headers SuperNovaSS has. The collectors are shaped identical to one another also. The only difference in the header flange is that yours are for stock rectangular exhaust port VS. round exhaust port for SuperNovaSS set. I cannot find a Casler header catalog or a Speed Part Company catalog with Casler info. Thanks, Don.