I have the 270HP crate motor with the GT-40 iron heads. I'm not sure if these are P heads but I don't have special headers. I just have heddman long tubes. I thought they were the P-heads though. Someone will probably correct me and tell me exactly which heads came on that motor. Anyway just thought I would throw that in there. You should be able to buy the correct headers from ford racing. Good luck with it. I'm pretty sure you will like the combo you have.
And do more research, I take the don't trust anybody approach when doing something big to my car, until I hear or read the same advice a couple of times. (Although Jeff65 seems to know his stuff.) Have a good one.
