an overdrive transmission would always be helpful. unfortunately, the Nailhead uses its own bellhousing pattern and isn't compatible with any of the more modern OD transmissions you'd want to use. you'd need an adapter plate.
if you have an auto, a manual transmission will get better mileage. it's also probably easier to get a Nailhead bell and then bolt up an OD man trans.
taller gear ratio in the rear and taller tires would also help, but both of these solutions would require a speedo gear change and would hurt your launches if you try to drag race at all.
tune up for the engine is always a good idea.
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
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