my Low dollar 318 hop-up project

was that highway or 45 mph zone driving??

So, you're driving your 4.88 geared duster to meet me, 70 mph on I-74, correct? :D
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Country roads at about 55. 55 was the speed limit back then.
We would trailer the Dart sometimes to save time at the track. We would have it uncorked with the slicks on it with the 5.13s in it ready to go.