As Shinjari said, but you need to reverse motor direction and hence timing so that it's not running with negative (retarded) brush timing. IIRC with stock axles and flipped tranny/skidplate it needs Clockwise rotation....so with SSD or VP Currie axles and non-flipped tranny/skidplate should still need Clockwise (CW) motor. Or if you're flipped tranny, you'll need CCW (counter clockwise) motor.