M-Marc

I want to add some more ponys to my shee, I do not want to do any kind of porting or machine work to the engine, but I was thinking of a noss head and a new back sproket maybe a 39 tooth, I have t-6's and a 15 tooth front sproket on it right now. I mostly ride on the street with friends, and I'm tired of being close to last, I want to be first. I really don't know the elavation level but I'm in Miami. If anyone have any suggestion's I will greatly appreciate it!!