i forgot to just look on 700r4.com
they have a speedo calibrater majigger...i put in my tire size and the rear end ratio and they tell me what tooth drive and driven gears i need.
looks like a 15 tooth drive gear and a 40 tooth driven gear.
Now I'll either buy them or do what Tim said and get 'em from the junkyard.
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87 iroc with the usual go fast stuff
heavier than your half ton.
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