My car has nothing after the badly-corroded cast iron exhaust manifolds. My plan is to use the Summit brand 2 1/4" dual kit for the firebird SUM-680100. The kit was designed to work with"Hooker headers where they do not exit parallel and at the same distance". So I thought, why not upgrade now to LT headers by hooker, for easier installation? HOK-4902HKR. Looking at these parts/kits, is there anything I'm missing? If anyone has had any experience w/ either of these kits, your opinion is greatly appreciated. Thanks