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I have a 1977 corvette. The car is highly modified and used to road rase. However it is can be driven on the street. It has 372 rear gear with a B&M 350. I'm looking for some info on converting the trans to a 700r. I was told this could be done with a electric switch for the overdrive when riven on the highway. I would like to do it this way as I can ture off the switch when racing. Anyone have suggestions?