I dont know if it was me i would still put an aftermarket MHG in just to be safe, ecspecially since your shooting for 350hp+ It wouldnt hurt, it's worth the extra money. its like $300 for a package, Greddy timing belt, HG & Head studs. Or just go with the MHG & Head studs. Just make sure you torque the head down right. Im not sure how much i dont remember, maybe 80-85lbs. Just ask someone on here. But i would still consider it if your planning on running more than 12psi. Actually now that i think about it that guy in Lynn has a MHG in his supra. Maybe you can buy that off him. See i always have good ideas! :biglaugh: But anyway just think about that and put up some god damn pictures of your progress :icon_mad: lol peace