I know this isn't Club Gas Mileage, but a good running engine is efficient, right?
I have been trying to squeeze every last available MPG out of my son's 1976 Monte Carlo. (350/350, until recently completely stock) Granted, this car won't ever be an economy car, but our goal is to make it efficient as possible. We have dumped the worn out old 2bbl/cast iron intake, and single exhaust and installed a fresh eddelbrock 1406/performer dual plane intake, and dual exhaust. The car's mpg and performance is noticeably better, but I think we can do better.
After some checking, we found that the vacuum advance isn't working. This is a perfect opportunity to "tweak" the distributor. What do you suggest as far as weights/springs, adjustable vac. advance canister, initial timing, all in by xxxx rpm? I know my way around a car, but I have never tried to get the most out of a distributor. How would I go about making improvements rather than just replacing the parts with other OEM parts?