Re: Best headers for 428?
Dang that '70 Fastback is sweet, My427stang!
The Hooker 1-3/4" headers are okay for a mild 428. They fit okay, make good power, and are not too expensive. They are the "best bang for the buck" in this situation. Kind of a sweet spot in terms of hp per $.
For a bigger or higher rpm motor bigger tubes will make more power. Hooker, Hedman, and Crites make 2" or 2-1/8" headers. The Crites are cheap at $320 and make great power but hang very low. The Hooker and Hedman big tube headers are very expensive at $700-$800. I haven't seen them installed in a car so I can't comment on fit.
I'd stay away from tri-y's for anything but the mildest motors. JMO on that.
Ceramic coating is worth every penny. Your tight engine bay needs all the heat reduction help it can get.
I have Crites 2" headers and sent them to Jethot for a Jethot 2000 coating. I sold my Hookers after they made less power at all rpms on the engine dyno on my 517 hp 428.
1967 Cougar. 432 cid FE. C6, 9 inch rear.