Originally Posted by
DBL15
Going to run 13.5 boosted does 75/ 24 gearing sound about right for this truck.
Will be running with shorty packs as well in RM3
75t is too small for truck and boost. Keep the stock spur which I would think is the the 87...run it like a hot mod. You can start in that pinion range and check for temps. I would prolly try a smaller 22-23 pinion though.