Old drift buggy back in commision

[tha5150]

Been packed up for close to 4 years. Pics below. Was a drift setup but in all honesty I paid and a friend built. Plus the 4 years have only added to my lack of knowledge.

Here goes. Looking to transform this into a street car and not a drifter. Looking for Spur and Pinion gear advice and of course, tires. I would like to peel out a little bit but still grip on turns. Not on a track, just in the street.

Havok 8.5 - http://www.ehobbies.com/nov3038.html

On this car setup, what is my Pinion and Spur setup when using top of the line 4600MAH batteries when not trying to fry anying?