Help Slash 32P Gearing

[mambarustler]

Hi,
I have quite a long time I havent used my rc's. Well I decided that since I don't have the money right now to finish my crt.5 conversion I might aswell find a use for the medusa 36-50-3300KV 5mm shaft I picked for $50. So I figured the cheapest and a safe way would be to go 32P, I am using a mamba max, the medusa, 3s lipo, and stock tires. Now what would you guys reccomend? Am looking to be running in the 40-50MPH range without having heating issues and such. Any help would be much appreciated.

Thanks