my vehicle is a 79 f350 and i dont know what exhaust to use on it. Im overhauling the engine(400ci) with my friend and just bought a carb and intake manifold for it. im probably going to get hooker full length competition headers for it. if i get the hooker exhaust kit that fits those headers, can i put glass packs on it or do i have to use the suggested muffler? if you have another idea for an exhaust system, please suggest!