[NeighborsComplaint]

Rear gear change, intake and 4 bbl, headers and dual exhaust. Leave the internals of that good running engine alone. I did that to a ‘65 Lemans 2 bbl 326. The rear gear ratio change came last. I did the headers and duals first which were the biggest bang for the buck. Made for a snappy little car up to 4000 rpm.

Everyone complains about header leaks but I never had issues. I’ve used copper, aluminum and Remflex and none have leaked. I always check the header flanges with a straight edge and grind any high spots or weld spatter before mounting. Using 1-5/8” headers, they aren’t that tough to tighten properly and retorque after the first heat-cool down cycle.