[ERA Chas]

For the record-the 31 spline does make a difference. But heat-treated ring and pinion, side gears and L-19 bolts are vital for total abuse. That makes a difference for drag racing and snap shifts.
As Rick said, if you control the usage, it will live just fine without that.
As Brent says, that's why there's a throttle control.
BTW-a 'solid roller motor' is not 10 megaton bomb in the configuration you're planning.
Glad to see that you have adopted more pragmatic approach-now you're getting it.