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View Full Version : General cost of installing new heads.


Danimal
08-18-2005, 03:56 PM
Can anyone give me a ballpark cost estimate and what all is entailed with installing new heads, such as the GT40's?

Are they even available for my '89 351?

Has anyone here done the swap themselves or did you have it done professionally?

ski_king
08-18-2005, 04:00 PM
Here (http://skidim.com/prodinfo.asp?number=RA003012FH) they are, but will cost you $1400 not counting gaskets, etc.

I want them, but will pass ofr now, looking for used ones, someday maybe.

Danimal
08-18-2005, 04:02 PM
Thanks! It says those heads are for '91 and newer. Am I to assume they do not make GT40's for an '89?

ski_king
08-18-2005, 04:04 PM
Sorry, I missed that, give them a call?

Danimal
08-18-2005, 04:05 PM
Sorry, I missed that, give them a call?

No problem. I think I will give them a call just to be sure.

Are there any other Hi Performance marine grade heads available other than the GT's?

Storm861triple
08-23-2005, 07:47 PM
Thanks! It says those heads are for '91 and newer. Am I to assume they do not make GT40's for an '89?
All 351w engines are the same. If the heads will bolt onto any 351w, then they will bolt onto your 351w.

Buying GT-40 heads for $1400 is retarded. Bend over. For LESS than that price, you could get Air Flow Research (AFR) 165's that would destroy GT-40's in every aspect of performance, economy and emissions. Please dont' buy GT-40 heads for $1400. They should be well under $700 for the pair.

Look for GT-40's and better yet, GT-40P's on ebay, and here:

GT-40:
http://shop.centralcoastmustang.net/osb/itemdetails.cfm?ID=40

P's:
http://shop.centralcoastmustang.net/osb/itemdetails.cfm?ID=38

AFR's:
http://shop.centralcoastmustang.net/osb/itemdetails.cfm?ID=39

and here. Look at the first two engines; they're only 302's and look at the torque!
http://www.airflowresearch.com/dyno/ford_dyno.htm

$1400 for GT-40's! Booo!

PointTaken
08-23-2005, 08:00 PM
If you are doing it to increase the horsepower, you might as well do the package: new heads, new intake, and new cam. Should get you over 300hp.

Storm861triple
08-23-2005, 08:20 PM
I agree. What he^ said.

PointTaken
08-23-2005, 08:34 PM
I agree with what he^ said about the price. For $1400 you should be able to get the heads, intake, cam and have them installed for about that. Check out jegs.com for parts. The will have everything you need. Make sure you trust the mechanic doing the job, if its not yourself, so you know its done right.

Danimal
08-24-2005, 08:47 AM
Thanks Guys... great info. I love this place!!

Lance
08-25-2005, 07:17 PM
Is it true that the GT40 heads are NOT aluminum? I have been thinking of upgrading but don't want aluminum heads due to possible damage during overheat event.

Storm861triple
08-25-2005, 08:08 PM
GT-40 and GT-40P heads are both stock, cast iron heads that came as OE equipment on various Fords through the 90's.

I wouldn't avoid aluminum heads for fear of an overheating incident. You'd have to over heat pretty badly to have any issues and decent PM should prevent any overheating; I've gone 5 years now and 450 hours and never had the slightest issues w/engine temp.

The main factor is cost. The iron heads above can be had pretty easily for around $500/pair w/some shopping. Aluminum are generally over $1k/pair.

-Tom

DooSPX
08-25-2005, 10:59 PM
Storm, are those links you posted include the valves, springs, etc. ??

shepherd
08-25-2005, 11:11 PM
You guys got me thinking about the GT 40s for my '90 PS 190. If I get them, what else do I need to replace if anything??? e.g., will my original transmission (1.52:1 powerslot) be able to handle the big bump in horsepower??? Water pump? Carb? etc...... :confused:

east tx skier
08-26-2005, 12:32 PM
Are the GT40p's what were on the late 90s V8 explorers? If so, a call to your local auto salvage might be in order.

pilot02
08-26-2005, 12:43 PM
All 351w engines are the same. If the heads will bolt onto any 351w, then they will bolt onto your 351w.

Buying GT-40 heads for $1400 is retarded. Bend over. For LESS than that price, you could get Air Flow Research (AFR) 165's that would destroy GT-40's in every aspect of performance, economy and emissions. Please dont' buy GT-40 heads for $1400. They should be well under $700 for the pair.

Look for GT-40's and better yet, GT-40P's on ebay, and here:

GT-40:
http://shop.centralcoastmustang.net/osb/itemdetails.cfm?ID=40

P's:
http://shop.centralcoastmustang.net/osb/itemdetails.cfm?ID=38

AFR's:
http://shop.centralcoastmustang.net/osb/itemdetails.cfm?ID=39

and here. Look at the first two engines; they're only 302's and look at the torque!
http://www.airflowresearch.com/dyno/ford_dyno.htm

$1400 for GT-40's! Booo!


From the skidim site....
These are the original GT40 heads with bronze freeze plugs and inserts (1991 and up HO Ford 351W). A very pleasant bolt-on upgrade over the standard 240/250 HP Heads. Additional 35+ HP and 400 RPM. Not GT40 "P" Automotive heads. That is why they cost $695.00 each. Original list price was $1,145.00 ea. The heads pictured are for reference only your head will be brand new and packaged in it's own box.

My question is this. What is the difference they're referring to with the "P" automotive heads?

martini
08-26-2005, 12:43 PM
Yes GT40ps are what was on those particular Explorers. Definitely look for used. Shep, the transmission will hold up as long as it is good shape. Everything else will be fine as well. It's not like these heads(gt40 and gt40p) are going to light the world on fire, but they will give your engine some nice pep and good torque. I have them on my 84 and I would say the biggest difference is in mid range to top end(it gets there alot faster) and the exhaust tone. The 351w heads are a little quieter, more mellow and the GT40s a little higher pitched and louder. I had a set laying around(former Mustang Cobra I had) and it was one of the best mods I ever did. I also did all the work myself, well documented on this board.

martini
08-26-2005, 12:45 PM
the "P" head was the next generation of GT40 and was used on Explorers in the mid 90's. It is an improved design.

Storm861triple
08-26-2005, 03:00 PM
WHat Maritini just said. I "third" getting them used from a salvage yard, but some people here don't seem "equiped" do take on that level of project.

Sheperd No matter what heads you use, you need not change anything BUT the heads. The heads have nothing to do w/the water pump, carb, intake, etc. as far as bolt-on compatability. You may consider changing the cam and intake to match the flow potential of the new heads, but you don't have to from a "fitment" point of view. ALL Ford 351W parts are interchangable, and physically compatable.

Storm, are those links you posted include the valves, springs, etc. ??The "P"s are bare and the plain '40's are loaded. You should be able to fine the P's loaded elsewhere though for around the same price as the 40's, or, as discussed earlier, a salvage yard.

NOTE: "P" heads need to have the head bolt holes drilled out to 1/2" to bolt onto a 351w. The 302 they came off of used smaller dia bolts.

darule336
09-16-2005, 11:42 PM
Will these fit a 351 if they came off a 302

Storm861triple
09-17-2005, 01:29 AM
YES! GT-40P heads will fit a 351 if they came off a 302.

But...

NOTE: "P" heads need to have the head bolt holes drilled out to 1/2" to bolt onto a 351w. The 302 they came off of used smaller dia bolts.