Kinda new to 4.6s here so cut me some slack What kind of cars would you look at if you wanted to find any PI stuff? I work at a junkyard and had a mark viii motor, and a ton of later model police interceptors.. I'm fairly certain i dont have and PI mustang motors. Just wondering what heads are any good that I can pull off of a stock car? Also, any good parts in general that could help me out on my 98 GT automatic? Any help is appreciated.