Header trouble 67 cuda

Does anybody know of acompany that sells underchassis headers for a 67 cuda? Im not fond of the tri y headers. Mopar action had an article about Tom Hoovers Duster/Demon where he shimmed down the K member 5/8 of an inch and put an under chassis header in. Icurrently have Hooker super comp headers that came out of it, but I want to put inner fenders back in it.I bought a race car, and I would like to make it streetable. Thanks for any input Ed.