sorry i just looked at my original post, and noticed that i didnt mention my itr head. Does that help? or do i still need to deshroud the head? Im not worried that much about costs cuz my cousin can get me the parts for decently cheap and seeing im building the engine i rather just do it right for the second time. And the head has ss springs, tit. retainers. Im questions the valves do to nitrous in the future and rather replace them now then have to replace the hg again. thanks for your replies