Sounds like you've got a plan together.

Is that going to be 2 motors, front & rear? If so, the integy's are probably your most economical solution.

Remember that a stock motor has locked timing so you can't use those if you're going to run one in reverse. (I just learned this recently...)

Yes, higher turn motors are fine for a crawler. 10mph is more than fast enough. What matters most (engine-wise) is torque. I'm running 19 turn motors in mine, they have adjustable timing, and 9 tooth pinions.

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