well the good thing about K series is that they are very repsonsive to bolt-on's so if you did that swap it wouldnt take that much money to make improvments...wich is good because usually people go broke just doing the swap its self..
now if you want boost...thats gana be ALOT of money to swap a K and boost it...so there your best bet would be an h22 or B series...
or if all else fails rebuild your stock motor, sleve it, build the head and then boost it...which just might be cheaper than the other options