Engine Question about gt40p’s

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Church401

Member

Mar 20, 2018

47

3

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Apr 3, 2018

#1

• Apr 3, 2018

• #1

Hey guys I’m heading to pick and pulls half off weekend and wanted to grab a set of GT40 or GT40P (modified header setup with p’s)heads. There just bolt and go parts? I’ve read about a million different things, from needing new pedistool rockers to needing new springs. The car in question is a 1992 notch 5.0.

 

sams93gt

Active Member

Mar 14, 2018

149

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Apr 3, 2018

#2

• Apr 3, 2018

• #2

Are the heads complete or just heads that need to be put together? If they are complete I think you will need the supporting mods for heads like, maf,tb,injectors, tune and if I'm not mistaken some stock and/or aftermarket headers dont fit right on gt40p heads? Just my 2cents hopefully someone more knowledgeable will check in, good luck with the parts man

 

C

Church401

Member

Mar 20, 2018

47

3

18

Apr 3, 2018

#3

• Apr 3, 2018

• #3

Hey thanks for posting I know with the gt 40- s, the stock fuel system can and will support the increased flow. The heads will be complete. Cause I will be pulling them from the boneyard . My question a more for the roller rockers and valve springs with the stock cam. I understand the p heads need modified headers.

 

C

Church401

Member

Mar 20, 2018

47

3

18

Apr 3, 2018

#4

• Apr 3, 2018

• #4

need new
head bolts
head gaskets
intake gaskets
thermostat gasket
valve springs
valve seals
valve cover gaskets
exhaust manifold gaskets
spark plugs
tube of RTV

Found some info seems like a straight forward swap. I just didn’t want to get caught with my pants down. You know you start the swap and next thing you know , you need a $200 set a rockers.

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,248

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Massachusetts

Apr 3, 2018

#5

• Apr 3, 2018

• #5

Target gt40 heads over the gt40ps. No special headers required

 

88LXSleeper

Active Member

Jan 6, 2016

146

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Apr 3, 2018

#6

• Apr 3, 2018

• #6

The P's use different spark plugs than stock. Headers will clear with 90 degree boot on #6 or 7 plug, pain to get plug out though.

 

C

Church401

Member

Mar 20, 2018

47

3

18

Apr 3, 2018

#7

• Apr 3, 2018

• #7

88LXSleeper said:

The P's use different spark plugs than stock. Headers will clear with 90 degree boot on #6 or 7 plug, pain to get plug out though.

Click to expand...

So your saying with a set of normal headers will clear with 90degree plug boots? Because my car already has 90 degree plug wires and tubular pacesetter shortys. Plus a little torch and hammer action could help haha.

 

88LXSleeper

Active Member

Jan 6, 2016

146

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48

Apr 3, 2018

#8

• Apr 3, 2018

• #8

Church401 said:

So your saying with a set of normal headers will clear with 90degree plug boots? Because my car already has 90 degree plug wires and tubular pacesetter shortys. Plus a little torch and hammer action could help haha.

Click to expand...

I have BBK headers on mine and it barely clears. Have to pull header to get plug out