from my research, there are a couple P-specific headers (frpp, mac) but they are shorties. also, according to other stangneters, you don't have to use p-specific headers, so yeah, longtubes will work. you have to use different angled sparkplug boots, though. a search may help you find this info--sorry, but that's all i know so far.
I have P heads with MAC ceramic coated LT's. They work great, and look great... I only needed to switch a couple sparkplug boots to the 90 degree ones, and I used a couple heat sleeves over them just be on the safe side. With that done I've never had any issues..
I have P heads with MAC ceramic coated LT's. They work great, and look great... I only needed to switch a couple sparkplug boots to the 90 degree ones, and I used a couple heat sleeves over them just be on the safe side. With that done I've never had any issues..