I was considering swapping my heads for a pair of 5.4 "PI" heads. I have been collecting info. on the swap from this forum but recently saw a post saying you can not swap PI heads for non-PI heads because the ports are shaped differently. Does anyone know anything about this (I'm glad I didn't by the heads yet)?

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'97 F-150XLT extra-cab w/ 4.6L Windsor and auto.
Superchip!
K&N filtercharger
Jett underdrive pulley
mild shift kit
K&N cat-back exhaust
Future plans:
4.6 to 5.4PI head swap
Dynomax headers
supercharger (haven't decided which one, yet)

 

I would think if the exhaust ports are the only difference, a set of headers or manifolds that match would solve the problem.
Just my .02

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'96 F-150 302
Hedman Hedders, Catco Cat., Gibson Super Truck, K&N F.I.P.K.

 

it is the intake ports that are supposed to be different

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'97 F-150XLT extra-cab w/ 4.6L Windsor and auto.
Superchip!
K&N filtercharger
Jett underdrive pulley
mild shift kit
K&N cat-back exhaust
Future plans:
4.6 to 5.4PI head swap
Dynomax headers
supercharger (haven't decided which one, yet)

 

It's the intake ports that are different I believe.

Search in the last few days. There is a post with Ford service verbiage about the different heads and which ones do not interchange.

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2000 EDDIE BAUER EXPEDITION 4x2

• Estate Green
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• Edelbrock Performer IAS Shocks
• Mobil 1
• Xenon Super White Head and Driving Lights
• Tow Package
• Rear Load Leveling
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• Century Child Seat!

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