hey guys, i have a few questions for you guru's out there. 1. I have seen different company heads ( like Romeo), what is the difference, and which will i need for my 1998 engine? 2. Also, ive seen that the heads have different valve covers or somthing about a certian number of screws... is this somthing else i need to buy? Basically, im looking to do a PI swap, and am trying to plan out what type or where to get the PI heads from, Ive seen several new and used on ebay and dont want to drop 300-600 on somthing i cant even use. Should i get a new head install kit with the gaskets and bolts etc that ford racing sells?