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Do NOT listen to people saying that you don't need a vacuum distributor on a street car. To keep your engine cold and to get good mileage you DO NEED VACUUM! Period.



With a GTX that has been driven on the street with no vacuum advance since 1986 I would not totally agree with that statement. It gets very good mpg and never runs over 170 degrees.

Filled up both of the cars in the picture at the same time and went to the same cruise an hour away and back and the blue car gets better MPG than the brown one (which my wife was driving) which is stone stock aside from a touch more timing dialed in.

To be fair even though the cars have the same displacement, transmissions and final drive gear ratio the Blue GTX has a slightly taller tire, headers and a well tuned set of AFB's.

The blue car fires up and the timing pegs to 36-38 degrees and thats it. So its not impossible and vehicles will vary in what the like.

My Duster with a 5.9 magnum? Loves timing. At cruise its at 60 degrees!