Help with a puzzling issues
 

I have a 00 Ford f150 XLT extra cab and the motor was swapped out some time before I got it so nowy intake is leaking in to plug wells 6 and 7 on driver's side I want to change intake and gaskets on it but don't know what the 4.6 came out of I look it up but can't find the right on I've been looking for cast numbers with no prevell I know it's a 4.6 and I know it's a windser and has pi heads and was built 7/22/01 in Ontario Canada but have no way of knowing how to find the right intake that will fit this motor well found plenty of them just don't know witch one is right I need some kind of direction on how to find this answer thanks a head of time of any assistance