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Re: gear's?
Welcome to the board TCASON.
Acording to the ealers books, in 68, a 307 with a TH350/Th400, would get the 3.73 rear unless otherwise optioned. With normal sized tires, that should put the RPMs at about 3000 or so rollin at 60 MPH.
That's not enough to hurt a healthy engine, even at long distance driving, but, if the engine is getting tired and worn, it can make it's mark on the engine.
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