f-150 heads

[2fAZT4U]

This is not lightning related I have a seat of heads of off a 1997 f150 that I'm going to sell a guy wants to know if they are PI heads what does that mean.

 

[Fade 2 Black]

If you look on one of the ends of the head it will have PI cast into it if it is a PI head. I don't think the PI heads started until 99 but I could be wrong.

 

[2fAZT4U]

thanks for the info.

 

[Five4Rider]

I know the P.I. heads started on the Stangs in '99, but not sure about the trucks. Are they 4.6 or 5.4 heads?? Post that and someone might be able to help you.