Yes another porting thread -_-

All right, basically ive got a malossi sport iron cast. I want to squeeze more out of it. (Im also considering getting a gear up kit as my bike has many malossi parts) before u start talking ish about dont port if i dnt know what im doing. What book/s would u recommend me buying? What about flowing the case. Should i raide exhaust port slightly and maybe widen intakes. To be honest i want to make it more like mhr rep or mhr. But wouldnt i need new piston for timing? I dont want a new piston so honestly what should i look at doing to get more power, also i want it to have that power off the line dont wana lose that to be honest. Btw i have a standard crank ahah. Evrrything else is pretty much set up ( by myself ) rollers belt clutch springs and contra so my bike runs allrigt, maybe need to drop needle a bit but meh. What should i do to ports to replicate maybe a better kit like mhr rep. Please help me out guys im not an idiot that dnt kno fhack all. Thanks