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I have a 3.70 rear with Tru-Track. With a 4 speed toploader I wanted a taller rear because at freeway speed I was screaming RPM's 3000-4000 at speed. I went to a tremek tko600 with the taller 5th gear and the 370 is great. I run out of 1st a little quicker than I like but freeway is 1900/2000 cruising...quieter and better gas mileage. 1-4 are for fun and fast, 5th the party is over and its time to settle down unless you want to go extreme. If you want 5th to be a driving gear get the .82. But you will have higher rpms on the freeway. I believe I have the .64. I also have around 400hp at the wheels.
John
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