If your going to go all motor then your gonna wanna do head work. I.E. cams, cam gears, new pistons, connecting rods, valves, valve springs, retainers, intake manifold, port polish, the list goes on an on... this route is gonna cost u a pretty penny. So, your best bet is to boost it. you can boost @ 8 or 9 lbs on stock internals which, will give you close to 250 to 270 whp with proper tuning. das schmoo would have better info on boosting a stock b18c1. each application has its benifits and down sides, it all depends on what you plan to do with it.