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Maintenance / Need help recalibrating my speedometer

« on: November 26, 2008, 12:21:53 PM »

  welp, here goes nothing. I have not owned my 67 camaro very long. They guy I bought it off of made lots of changes threw the years.  he was a drag racer, and raced it for a wile. then bought a vega and pretty much made the camaro a street car. the camaro now has a 388 small block chevy with an m21 4speed. the speedometer is not hooked up. the car has a 66 dodge dart rear end with a 3:55 rear gear in it.  she also got bigger tires and rims.  If i hook up my speedometer im guessing its going to be way off. where should i start to try to get a better idea of how fast im really going?    Im going to take out the m21 soon and install a t350 i would like to race the car everyone in a wlie so im going to keep the rear thats in it now. but yet i still wana take it out on dates and drive to work every once and a wile.   thanks for all the input.