As for the double hump I believe it was 73-4 only. Grand Am should work as well. They pop up here quite often and Pontiacman had one listed a few days ago.
http://forums.maxperformanceinc.com/...ix+crossmember
As for the exhaust shops, I have a good relationship with a great exhaust guy here in FL. As long as I do not ask him to remove the cat (gone before it arrives at his shop) he builds a nice system. He did my 76 a few months ago and it turned out beautiful.
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1969 Pontiac Firebird 400 Convertible
Don't drink and drive. I really don't want you as a customer
