Thread: How bad is your gas mileage?
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Old 06-12-2008, 09:46 AM
c6ae c6ae is offline
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Join Date: Sep 2003
Cobra Make, Engine: ERA - 427
Posts: 56
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ERA car, stock 428 CJ w/750 Holley got 11-mpg w/mechanical dist.
I switched to a vacuum advance distributor; no other changes and now 14-mpg

The vacuum dist is stock Ford with Pertronix, curved to factory specs for a 4V 390.
Of course if I want to I can get about 6-mpg…
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