What MPG are you guy's getting, What combo/

66cuda said

No disrespect intended...BUT GAS was quite a bit different back in the 70's and that combo will likely NOT provide the same performance today...and with todays gas, Vacuum advance is moot,

Time your car properly, change plugs Filters often, stay out of the pedal and your mileage will improve

Click to expand...

Yes I realize fuel is "different" but not from 14 to 4. I don't understand your comment about vacuum advance----they are one VERY important aspect of mileage.

You put your foot in--the advance drops back to the "full power" setting of the mechanical limits

You take your foot out--the vacuum comes up--and the advance goes up another 10* or so under light load Gas or no, THAT part has not changed