Quote:
Originally Posted by 67ChevyRedneck
I didn't either. So 1,000 if for all 67-72 stock speedos? Where did you find that info?
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I wish I had a answer for you and a manual to point to that has the specification data but there is none that I have available to me. I can say that by using the 1000 revolutions per mile in your calculations your speedometer will read correctly for a 67-72 Chevy truck. Most cars and trucks from 1965 and up use the 1000 revolutions per mile on mechanical speedometers.