1965 MOPAR, 273 Exhaust Maifolds

Left side will hit with 64-66 LH or Drivers Side exhaust manifold using 73? up LA heads with the air boss. No problems with 67 up manifolds. Magnum heads have the same small exhaust port and do not have an EGR air port so they should work with the 64-66 exhaust manifold as well.