I have a jdm b18c. so far this has became a huge dent in my wallet. i would like to know if i should spend more money on extra parts, like, "is it nessesary to buy aftermarket cams or have head work done""Seals and gaskets", stuff like that. I am not trying to cheap out now, over 12k into motor and car in past year. this is my first honda build, k guys. I am turbocharging and shooting for 400hp+.my current set up is: Jdm b18c,JEpistons 9:1, bored and sleeved to 84mm, Eagle rods, Eagle Crank, blueprint and balanced. My mechanic is asking if i want head work done, is it nessesary. I heard gsr heads already have a high flow.I will buy arp head bolts and felpro gaskets.