Got my intake off, 351 w head question


Sep 26, 2007
I have a set of 69 351 w heads, and one head is confuseing me.. The valve on only one head is pushed into the head, it still springs. But it is not flush with the head or overlapsed at all.. The intake gasket on my 5.0 was blown and caused a loss of power. So i bought all new gaskets and have the intake off.. I want to proceed and take the stock heads off and put the 351 heads on but im not sure about this valve.. Please help me i'd like to have my car back soon, thanks
  • Sponsors(?)


Sep 26, 2007



Like i said old heads, looked like the slide was bad and the valve started hitting the side weairing it out.. but im not that much of a motor guy. The last time the intake gasket was changed whoever did it didnt change the bolts or put any ceasent. One bolt is still in the head and i now have to send it out to be retapped.. unless i can pull something off, will 302 valves fit in the 351?? 351 heads


Dec 25, 2006
Bellevue, NE
C9OE valves are 1.84"/1.54"

302 valves are 1.74"/1.45"

Just my opinion but by the looks of the photos, IF you could save the old 351 heads your machine shop bill will be more than porting your E7's or finding a set of GT40P's.


Active Member
May 22, 2007
going buy your post in talk you found an explorer motor which has gt40 heads. I would wait and save the 351 heads like posted and jump to those if you buy the motor for the parts, It would work out better in the end.


Sep 26, 2007
Yes i have came across a explorer motor, im saveing the 351 heads and will have them redone at another time, thanks for your help.. the seat on the valve is SHOT


Founding Member
Jul 24, 2000
Orange Park , Fl
The C9 heads have soft seats... made back when gas was gas..LOL To fix the C9 heads you NEED to have hard exhaust seats installed ( usually 120-150.00 at a shop! then valve job and your unleaded fuel friendly!! You might have the shop check the valve guides for wear also!! The C9s are the pre-runner to the GT40 heads.. the GT40 heads are better today, thru the conbustion chambers and runners/bowl.. SOOoooo... finding the Ps is a good idea and sell the old C9s''''' cool??

Just me..................................

Thread starter Similar threads Forum Replies Date
Pokageek Ok, got the intake completed. How do I clean the grease marks off of it? 1994 - 1995 Specific Tech 4
L Got my intake off.. now what? Fox 5.0 Mustang Tech 7
C Help Me Verify That I Got The Right Intake Manifold SN95 4.6L Mustang Tech 2
KBExperience Got an intake put on, and got a tune! Very Satisfied. 2005 - 2014 S-197 Mustang -General/Talk- 2
9 how to tell if my cars got pi heads or just the up graded intake 1996 - 2004 SN95 Mustang -General/Talk- 7
T Got the Pi Heads and intake now i need help with a cam 1996 - 2004 SN95 Mustang -General/Talk- 5
L Got my new 5.0 Intake From MMR 2010 - 2014 Specific Tech 4
W just got my cold air intake on 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
G finally got an intake... input please Fox 5.0 Mustang Tech 4
S Got some gt40ps And intake 1994 - 1995 Specific Tech 4
S Got a question for anyone with a aftermarket intake 1994 - 1995 Specific Tech 4
xtweakerx ppl who got a brenspeed sct tuner w/ a intake come in 2005 - 2009 Specific Tech 21
fivespeedsteed got a new intake plaque. help sanding and painting. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 15
jhonda got a cobra intake 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 2
4.6boy got a Q about intakes SN95 4.6L Mustang Tech 3
strtrcr50 Got my intake back from being powdercoated 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 14
5spd GT Who has got an intake ready to install... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 47
OV10stang Got the Trickflow Track Heat intake 1996 - 2004 SN95 Mustang -General/Talk- 31
Texstang9682 Got the PI intake installed good stuff SN95 4.6L Mustang Tech 10
Rickey_Bobby HOLY ***** trickflow finally got a 4.6L intake out on the market!!! 1996 - 2004 SN95 Mustang -General/Talk- 7
blackened88lx Got my intake today (Saleen/Vortech) 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 47
carbed87 got my bbk ssi intake in: PIKAGE 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 32
A Anyone Got A Replacement for the Rubber Intake ? 1994 - 1995 Specific Tech 4
nazstang Got RPM II intake! now what Heads? Fox 5.0 Mustang Tech 11
9 finally got a new intake trick flow for CHEAP 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
babeabe19 ANYone got there cash from FORD for the intake manifold??? SN95 4.6L Mustang Tech 16
S Friend just got a 91 GT, TFS Heads, Cobra Intake, ect, smokes GREY at wot? Any ideas? Fox 5.0 Mustang Tech 9
Stormwalker Hooked up Cobra intake wrong - coolant got in intake Fox 5.0 Mustang Tech 3
Zero Signal Got the new heads and intake, and a question. 1994 - 1995 Specific Tech 6
O my intake finally cracked, got some questions? SN95 4.6L Mustang Tech 26
MustangMulch Got myself a Cobra intake manifold, TB.. etc. Questions... Fox 5.0 Mustang Tech 8
bjl95mustang Just got my intake and brackets back from the powdercoaters today. Damn i'm Happy... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 5
DFG 5OH Got My Cam/Intake Elbow 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
DFG 5OH Got My Heads/intake 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
C Got the Cobra Intake on..... drove it, having problems. Fox 5.0 Mustang Tech 8
Scott_95GT Got a Cobra Intake, have a few ?'s 1994 - 1995 Specific Tech 5
/\ Vader /\ Got my Cobra Intake 1994 - 1995 Specific Tech 4
S GOT 3 upper intakes w./ throttlebodys and one lower Fox 5.0 Mustang Tech 2
zenboy99 Got a Performer RPM intake 1994 - 1995 Specific Tech 14
Y Got a new intake manifold, trickflow box... 1994 - 1995 Specific Tech 38
S Installed a Intake and TB and i got problems!!!Please HELP???? SN95 4.6L Mustang Tech 12
84blkstang Got my new intake installed today.....??? Fox 5.0 Mustang Tech 2
P Booo, got a warper intake manifold! SN95 4.6L Mustang Tech 2
N Bought a unfinished 5.4 dohc into 97 gt project. I)ve got lots of questions. The Welcome Wagon 2
C Hi guys i just got a 2003 mustang gt 4.6 how do check kow it the car has pi heads SN95 4.6L Mustang Tech 6
M Progress Thread .351 roller, cam bearing cracks, I've got em #2 & #4 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
C Just got a 1990 lx notchback. I need help please 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
DudeStang Progress Thread Finally got my first Fox Body - 1988 GT 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 323
Twitch'n Twitcht4life My P.M.S. got stolen from my car. Hey 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
mattbaker302 Gots me a 351 Cleveland 1965 - 1973 Classic Mustangs -General/Talk- 12
Similar threads