66 dart slant 6 to 360

Your kick down linkages won’t work, they sell a cheaper lokar kick down cable and gas pedal cable assembly for cheap will bolt on to a four barrel intake and 904 or 727, now for the exhaust either choke you motor with the stock early abodymanifolds or spend some serious cash for headers or do some fabrication installing a 340 drive side manifold and a Jeep Grand Cherokee passenger manifold