hey guys I am new to nitro not rc cars i used to race eletric off road. I have a nitro truck .... got it for 45 bux and it runs and drives and has quite a few after market parts on it. its a losi nxt. I would like to throw out the dynamite .12 and go for the os max .15 but i dont know what i will have to change along with the engine. any help would be appreciated.

kyle