The romeo heads can be found on 4.6L powered mustangs 2001-04, 01-current crown victoria, 02-05 4.6L explorers,01-04 F150's 4.6l's with the 8th character of the VIN a W. The valve covers from your 5.4 will not fit romeo heads. the valve covers from a romeo powered f150,explorer and i think a crown vic will have the oil fill on the left side. your intake will bolt up fine to those heads.

 

No I don't think that it is that easy.
I am putting an 02 engine in my 97.
The intake from the 97 fits but the intake gasket from a PI head will not match up to a NPI intake.
The intake valley is different and the water pump line and knock sensors interfere with the old lower intake.
I had to buy new NPI intake gaskets and remove the locating pins, and "massage the bolt holes" so that they would fit the new PI heads.
Also there are other fit problems PI to NPI, Windsor to Romeo.
What sensors are there and which way is the intake situated.
Do your homework before you thing everything just snaps together.

 

He's already got PI heads so he don't have the same issues you do

 

Thanks for the info! When you say that my intake will bolt up fine, do you mean that the openings on my intake are the same as the openings on romeo heads, or would I need to get them ported to match up? Thanks again.

 

seen as how you have a 99 5.4L it is already equipped with PI heads (windsors).
but all PI heads windsor, and romeo have the same port shapes and use the same intake manifold gaskets

 

Well I indeed do have PI heads. Stamped on the side of my pass. side head is "R-F XL1E 6090 C20D" "PI" is stamped just below that. So......when going from windsor PI heads to Romeo PI heads I will be gainig the extra spark plug threads I desire....CORRECT? Also I will have to change valve cover because windsor covers wont fit romeo heads....CORRECT? Last question....will my intake ports on my intake(windsor PI) line up with those on the new heads(Romeo PI)? <----this is my next problem that needs to be determined!
http://www.powerheads.com/headswap.html
I like this guys stage one set up, he said he will take $200 of the price since i dont need the intake. Does this kit come with everything I need other than valve covers?
THANKS FOR ALL THE HELP AND BEING SO PATIENT WITH ME!

 

That is really confusing that the 8th character of the vin is a "W" for "R"omeo heads..shouldnt ford have used a "R" for the Romeo's and a "W" for the Windsors? Just some food for thought!