I need an intake manifold for my 98 4.6 but all I can find is plastic. I would rather have aluminum but the only ones I can find are for a 99. To use this I would have to change my heads to 99 heads. Does anyone know of anything else and if so where can I buy it?
Thats a pretty tall order. Dorman makes a real good '96 thru '98 plastic replacement w/ the aluminum X-over and reinforced plastic in crack prone areas but, nearly all the aftermarkets are for the "sweetheart" '99+ Windsor & Romeo versions.
You could use a $500 aluminum PI or a '99+ plastic PI replacement but I have read a lot about the mixed results concerning port mismatch, leaks and coolant loss/gasket problems.
Personally, I'm considering a complete '04 Romeo engine swap.
Yea, you need the PI heads, they don't match, the 99 thru 2004 gt heads are different from the 96 thru 98. Its probaly worth the head change, easy for me to say though!!