revo brushless platnium

my question is for anyone who has done an electric conversion on a revo with the tekno rc conversion.
I have a mamba max esc with a neu 1515 motor with an electric clutch conversion what is the best clutch bell to use and spur gear.I race this truck only on the track in the truggy class so im not looking for a lot of top end mainly just good traction on the loose track.Ihave a 3 piece clutch shoes and the stockspur gear with a robinson metal trans thanks for your help also running a losi 5000 lipo battery