Can someone tell me what year of the 5.0L Explorers had the GT40 heads and which year they started using the GT40P heads. I am trying to buy an engine out of a 97 Explorer but I want to make sure it has the GT40 heads.

 

They started in about 1997.5.

http://www.stangpro.com/html/article...les/gt40p1.htm

 

I have a February 97 build date and I have the GT40P heads in a Mountaineer. I have heard of later build date Explorers that don't have them though.

 

96 through mid February 97 had GT-40 heads. Late February and later have GT-40P heads. There might have been a few in the later part that had regular GT-40 heads, but not many because the setups had more different parts than just the heads.

Besides looking at the spark plug angle on the heads, the easiest way to know which engine you are looking at (if you have the entire engine) is to look and se what EGR setup is on the Explorer. If it has a tube running from the EGR valve to the passenger exhaust manifold, it is a late 97+ model with GT-40P heads.

 

Thanks....that is very helpful. I am trying to buy it from a salvage yard 100 miles away and I plan to put it in my 84 F150. I just want to make sure that it has the GT40 heads so I can get a set of headers for it. Thanks again!!!

 

GT40 and GT40P heads can take the same headers. I would suggest looking at Torque Monster headers personally, but since you are going into a F150, there are other choices also.

Are you buying an entire vehicle or just the engine? If you could, I would get everything you can from them - wiring harnesses, PCM, etc. It would make the swap a lot easier unless you are not going OBDII.

 

My plans are for a carb system/headers/no cats and true duals with magnaflow mufflers....i realize i will need my oil pan/ timing cover/ mounts/ etc....I hope the roller cam system from that year will work with a 4 brl carb