Local craigslist add for two 4.6L one 2001/2002 one 03-05.

Assuming they are Romeo blocks, I believe they are PI heads. So if I swap intake and front cover the rest should work?

 

Ok cross referenced it all and pretty sure intake and front cover swap is all that is necessary. Don't know if town car, etc had different cams or if that will have any major effect?

 

I can't answer your question. And even if I did know enough about the subject, your question is too vague.
Swap what with what?
What vehicle & engine are you working on and what are you looking to swap into it? You would need to not "assume" anything and find out for sure what it is that you have and what parts you need to fix it or which engines work with what you already have.
The Ford 4.6L Modular Engine