there a guy that has a b16 head, its complete head without IM but the guy said the chambers need to be working on. and the price to machine it would be approx. 250$ that he stated. The head is for sell for 100$, but im going to trade my complete k20a3 head for it. The question is, is this a good trade. should i pick up? i need answers asap plannin on picking it up 2morrow. THanks!