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Old July 20th, 2013, 12:26 AM   #1
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Junkyard gt40p bundle


Has anyone bought a bundle from a junk yard along the lines of gt40p heads, upper/lower with TB and spacer, Injectors? What price range do you think it'd be around? i was going to buy a set of gt40p heads that came off a buddys car for 75 bucks without pushrods or rockers with unknown miles and unknown valve springs. Thinking it might just be better to pick up the top end of an explorer and go ahead and do the whole new valve spring upgrade to make sure and know. Also will an SN95 brake fluid reservoir fit fox? not too big of fan of this metal ugly one.
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Old July 20th, 2013, 02:00 AM   #2
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My 91 came with a plastic reservoir. Im not sure what year that started
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Old July 20th, 2013, 10:16 AM   #3
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Originally Posted by Fbody View Post
Has anyone bought a bundle from a junk yard along the lines of gt40p heads, upper/lower with TB and spacer, Injectors? What price range do you think it'd be around? i was going to buy a set of gt40p heads that came off a buddys car for 75 bucks without pushrods or rockers with unknown miles and unknown valve springs. Thinking it might just be better to pick up the top end of an explorer and go ahead and do the whole new valve spring upgrade to make sure and know. Also will an SN95 brake fluid reservoir fit fox? not too big of fan of this metal ugly one.
I would pick up those GT40Ps for 75 bucks. junkyards usually want more than that because they're out for money. You can have the springs checked to see what they are, if they're aftermarket that's already a step inthe right direction.
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Old July 20th, 2013, 10:36 AM   #4
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The last time I bought a complete engine (throttle body to pan) the cost was $500 in Dec/2006. That was for a 2002 (last year) with 62,000 miles. Opened it up to change the pan/front cover to Mustang stuff and it looked brand new inside. Worked good for me because I used the entire engine along with the required performance mods.

One of my best friends bought a complete one (not sure of year) with 90,000 miles on it for $400 within the last couple of months.

A pair of P heads for $75 is about as cheap a buy-in as you're going to get. Unless they've already had a spring upgrade, figure your going to need a set of springs and definitely a valve grind. That they are missing rockers and push rods, not a big deal for most as aftermarket roller rockers and heavy duty hardened push rods are likely to be used anyway.

The intakes are easy to find, there's usually 20 of them for sale on Ebay at any given time for $100-$200.

The throttle body is not a plug-n-play. Besides adding the 90 degree curved tube for the valve cover breather hose to attach to, you have to change the bottom plate on the throttle shaft to one from a Mustang so the attachment and lever ratio is correct.
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Old July 20th, 2013, 01:10 PM   #5
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The heads did have 1.7 rockers used with a b303 cam and worked fine, he sold the rockers off of them.
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Old July 21st, 2013, 12:32 PM   #6
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How long would you imagine stock valve springs would last up to a b303 cam?
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Old July 21st, 2013, 12:49 PM   #7
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I would not recommend ever running the stock P springs with any performance cam, not even a stock Mustang HO cam. They are simply too weak.
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Old July 21st, 2013, 03:18 PM   #8
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He said he assumes they are stock springs, but the car ran with b303 cam and 1.7 rockers on them, id imagine they're upgraded.
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Old July 21st, 2013, 03:49 PM   #9
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Technically, the cam will run on those springs but it is not advisable. Valvetrain stability in the upper revs is going to be none.
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Old July 21st, 2013, 05:22 PM   #10
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Hm im unsure of the cam ive got in my car now and not sure if my motor was swapping from 86 to and 87-93 car or not, i've got so many unknowns i feel i should just replace everything, even if i just do these gt40p heads i will still have to buy oil pump, valve springs, gasket kit, valve covers, all fluids, dowell pins, new upper, lower, TB, injectors, fuel rail, timing sprockets and chain, and im sure there's more im forgetting... I'm going to add it all up tonight but it almost seems if its just buying used cast iron heads, used TB intake etc if its just $500 more or less than i feel i should just buy a complete upper end kit from LMR.
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