I already thought about that option...the pros and cons...i realized their were more cons than pros, but if I buil;d everything right, i can hang with turbo ludes most deffinatley...and if I have everything done all motor then i decide I wanna change to turbo, all I will need to do is get low comp. internals instead of high comp. ones, and if I sell those then I wont be spending much at all, so i am staying all motor for now, and my options will always be open..but yea does any one know about the valve question?