Not a bad deal but I much rather see you go with a cool head and cut domes with the rite porting,you dont have to port rite away but I dont know personally how much power you would gain from just a crank.
Pretty cheap deal,If you want to port later then just buy the kit run it ,when your ready its going to be pistons,bore,porting,coolhead instead of just spending now on coolhead and port.You get where im going with this Its like doing everything twice if you decide you want power.A 4mil play port is reasonable from fast racing plus you get discounts if you buy with him.I would hate too see you put it together and not be happy