GT40 head question

Jim: thanks for the link.

I am always amazed at how easy you guys make some of this stuff seem.

john

To bad they save youth for the young...I could make such better use of it now that I finally know what is goin' on.

john

I wished I lived a little closer Boat doc, I'd love to see your dogs hunt.

I'd like to see them too...dr I think you remember I had a Springer...did not hunt tho. But I would love to see a pic of your guys.

john

Try (clearwater cylinder head) they have about the best price around for P-heads I think they are around 400 bucks!

I checked with Clearwater about 2 weeks ago. New are 260 ea and rebuilt are 175 ea. Shipping is 25 ea. 2 year warrantee on rebuilt and 3 year on new.

TRBenj wrote: horkn wrote: Tristate has sets of rebuilt gt40ps for 700 dollras,a nd I think that isstill too much. I bet I can find a used set of p heads for 100-150 and have a valve job done, totalling under 500 dollars. Their price has gone up over the last year or so, but dont forget that they also install upgraded valvespings (good to .550 of lift), which is really a weak point on the stock P's if youre adding a cam. A good set will run you upwards of $130 plus install, so that brings the price right in line. I went the same route youre propsosing (bought used, had a VJ done) and if I were to do it again, I would go with Tristate. Just my 2 cents. If youre not planning on upgrading valvesprings, go with Clearwater- I dont see another way to get a complete set of rebuilt heads for $400. .

Tim, Not only has their price gone up but when I bought mine about 1 1/2 years ago they were new castings, they seem to only show rebuilt now.

We put a set of the Clearwater rebuilt heads on "Jbears" boat last year along with an intake and it picked up 5MPH, it went from 45 to around 50+ MPH and thats without a cam, not bad!

TRDon wrote: cant just get them off of any mustang, has to be a 93-95 cobra or a 95-96 explorer (GT40P) Other mustangs had (for 87-93) the E7TE head which may be better for performance, but isnt worth the swap IMHO. If you have the tools and skill to port the E7s then it may be worth it. Ski dim sells the heads for an astronomical price, you can go on corral.net and get a set of used for under 500 shipped vs ski dim that have them for over 1 grand a piece

Ok, I have come back to this thread becasue I acquired a set of used GT40P heads off of an explorer, and I got my performer intake for My b day in March, and now I will be installing these this weekend.

Pre 96 5.0 explorers until mid 1996 had normal GT40 iron heads. The 1996.5- 2001 explorers had the GT40P's. 87-93 e7Te mustang heads are a much better head than the stock heads on non gt40 351s. I have a complete 302 HO from an 87 5.0 mustang. But the gt40p heads are better than the e7te's in stock form. If you port a set of e7te's, you can get more power than with a set of stock gt40ps, or GT40's

The gt40P flows more than the gt40 iron head stock. The P heads are nice for boats since for car use, the headers either need to be replaced, or hammered in to fit. The plugs are in the wrong spot for auto use. Good news for us marine guys.:)

My P heads I got for 199 dollars, and had then 3 angle valve job, and head bolt holes enlarged to fit the 351w from the 302 it was on. They were also decked .60 to true them up, and had new brass plugs installed. With a full gasket kit for my pcm 351, it was 600 dollars total.

My p heads came off of an explorer that should not have had P heads, but iron gt40 heads. It was made a few months before they were supposed to have had P heads, which is why I got them for 200 dollars. The guy wanted iron gt40 heads form the early Explorer for use in a mustang, so it worked for me.


So, off I go to rip the old heads and intake off,and put the new upgrades on. I am certain I had a leaky intake manifold gasket/ seal. So hopefully this will cure my running issue that came up last year. And it wll give me a nice shot of HP as well:)

I bought a Mr gasket 1932 adapter to mount the holley 4160 to the edelbrock performer intake, so hopefully it fits.

I am guessing I will need a shorter flame arrestor, but that will be minor after I get all the rest of the top end done.