With gas prices now reaching $3.50/gal.(thanks Mr. President)I'm searching for ways to make my '63 C-10 as fuel efficent as possible. The engine is a 250 six that was pulled from a 1970 Nova by the previous owner. It has a single barrel carb. So far I've switched the points to a Pertronix set up, had the carb rebuilt(but it's still leaking). I plan to switch out the old exhaust manifold with a set of Headman headers. They claim it will increase gas mileage up to 10%. Can anyone give me some advise as to extracting the best possible gas mileage out of this engine?
