Are 4v heads a direct bolt on or are there other things you have to do to make them work? Don't get me wrong, I love the 4.6. I just came into some money and I'm starting to think about doing a headswap ...
Or am I better off going with P&P PI heads and a new exhaust?
it is not a direct bolt up. I posted this question a while ago, and i heard a lot of bad things. There are several components that have to be moved around. You are better off with PPI heads and a S/C.