It might be cheaper to buy a short block that has already been built, from a company like D.S.S., Coast High Performance, Sean Hyland Motorsport, etc. I'm not sure if it would be or not, just trying to give you some ideas to look into. And I would defanently build my engine first, then you can get a bigger blower and run more boost, you might need to invest in some head work though, like stiffer Valve springs.