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Originally Posted by olddog
Today I have 3.50:1 rear gears, 295 50R 15 tires, and a TKO 600 5 speed. Fifth gear is 0.64:1 or about 71 MPH at 2000 RPM. The cam doesn't like steady speed much bellow 2000 rpm. At 1800 rpm depending on load it may start to surge. So basically 5th is useless. On top of this the gears seem a little tall for best performance.
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With your combination, I think the problem is not the tranny / rear ratio, its your engine, its got a too radical cam for your tranny/rear combination. You need to put a milder cam in it, ? about 204/214 duration.