Personally i would build a motor insted of buying a crate motor because even though you can get some decent deals on crate motors i still say you can save some $$$ by building one.

Just as streets said though if you replace anything on the motor then the warranty is out the window so you need to decide if you can resist the temptation to "add" any more speed parts.

If you do go with a crate job and the 440HP's not enough for ya they also have the zz502 with 502hp....not sure of the price right off hand.

BG