[Curt C.]

Those heads SOHC (PI) are the same ones that come on the newer motors - 99 up. They made these available because the 96-98 heads were such dogs. The 4 valve heads are the same as what comes on the Cobra. No real aftermarket heads are on the market. That is a good price for the 4 valve motor and tranny - $6K? Is that for real?


"Which engine for aftermarket performance and still being smog legal offers the most: performance, cost advantage, and parts availibility?"

With respect to cost advantage and part availability, 5.0 litre hands down. Dont get me wrong, I love the new modular designs. They make good power and are the future. Aftermarket is slow to come with new bolt one parts though. Look at all the head and intake offerings for Windsors. Not one head for 4.6 versus 20+ for Windsor. Reichard now makes a fabricated intake for the modular, but it is insanely expensive.