Miles per gallon?

67Dart273 said

That sounds better, and more reasonable. "City" driving can certainly knock things down.

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Yes, exactly. Any time the car is at a stop light, it is just burning fuel. Might as well measure in gallons per minute. Acceleration from stops uses more fuel than cruising or coasting too, but that's at least more consistant. It's the difference in time not moving that generally makes "city" is so hard to compare.

When you get a chance, check if the distributor has ever been changed. Replacement distributors were (are) somewhat generic. So the only way to see if the curve is in spec for your particular engine, year and options is to test and tweak if needed. It runs good, so its probably close, but if you're up to it, checking both the mechanical and vacuum advance is a good place to look for milage.

To add my /6 milage experiences to benchmarks here. Stock smogged '75 Valiant w/ 904 commuting from '83 to '88 it regularly averaged a bit over 17 mpg in mixed/city. A rather loose '68 Barracuda got well over 21 mpg on the highway when I brought home. Engine (with points) was really responsive compared to the smogged and heavier '75 Valiant even with electronic ignition. Too bad it spun a rod bearing on the way to work a month later...