At that power level, with that trans and wheel/tire package, 3:70 is perfect. Plenty of second gear for autox and plenty of 4th gear for most big tracks.
I like the Strac from strange. It has proven to be bulletproof. A customer has had one in service for 5 years now with zero issues or degradation of performance. The helix is higher on the Strac gears so the bias ration is higher than the wave or true tracs. The only downside is only available in 35 spline.
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Donny
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