Im going with a mild small block and was gonna run trad. headers and duals but ran into a vintage set of sidemount hooker headers and hooker lake pipes with muff in them, they were taken off a 76 van that never got built. They dont make them anymore but hooker still does for vettes and old novas and they get 8-11 hundered for the whole set and these are with short 50 inch tubes. The pipes are near perfect and the tubes have a bit of surface rust so I will have them recoated. I even have the org hooker instructions.