Gearing for XX4
 

Hi Guys

going old skool and getting an XX4 to run vintage races, thinking of putting a 10.5 brushless motor in it.

Questions are,
1. Will that be good enough or a hotter motor needed, but dont want to overstress the 3 belts?
2. If this is ok what pinion should i fit?

Any help would be great

Regards

windy