United Speedometer in CA is a great repair shop that can change the calibration. Look them up on the web and give Rick or Butch a call. They'll tell you what info you need to give them along with the tach and an estimate of the cost.
'62 Chevy C10 Short Bed Step Side, 235 Six with Offy intake, 2 carter/weber 2bbls and Fenton headers. B-W T5 5 speed trans, with stock rear end.
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