Gearing Questions

[teamhelotes]

I just put together a Revo with the GorillaMaxx carbon fiberkit, emaxx tranny with the GM 1 speed, Hacker 11L. I will be running 4 cell lipo. I am asking what gearing do you guys think I should start with? I had to put on a 72t spur just to get it to the pinion, the motor hit on the tranny.

I am currently running 32P can I go to 1 mod? If so what do I need to do.

Thanks for the help.