Headers for a 1978 Mach 1?

To the best of my knowledge, shorty headers won't work. Someone may have more info on that front than I do, I don't have first hand experience with it. As for any other headers, none were designed with a C6 in mind so I don't know if standard off the shelf headers would work either. If I had to guess, they would probably work just fine on the driver's side, but the passenger side may have problems going around the starter since I'm sure it's clocked in a different position than stock.

I've run the same Blackjack headers since the early 90s, so I haven't had to search for alternatives and don't even know what's available or not anymore. I do know that the Blackjacks aren't available anymore and the concensus is that they were the best fitting option for a stock automatic.

Hooker super comp from Cassic Auto Reproductions
Look very nice but almost 900$ Can probably find a non coated set cheaper some where else.
Don't think they will get along with C6