[topic split] GT40 markings..How to tell

myillwillinc · 12-07-2005, 02:01 PM

how do you tell if they are gt40 and not stockers? i have some in my garage i was told they were but i don't even have a 5.0 anymore so i need to clean out my garage...

TheJeanyus · 12-07-2005, 02:02 PM

Quote:

Originally Posted by myillwillinc

how do you tell if they are gt40 and not stockers? i have some in my garage i was told they were but i don't even have a 5.0 anymore so i need to clean out my garage...

They could be GT40s and be stock heads.

Italian LX · 12-07-2005, 02:18 PM

Quote:

Originally Posted by myillwillinc

how do you tell if they are gt40 and not stockers? i have some in my garage i was told they were but i don't even have a 5.0 anymore so i need to clean out my garage...

I'm not sure off the top of my head what stampings would be involved, but you can alway measure the size of the valves.

joker · 12-07-2005, 05:16 PM

They have gt40 stamped on one end of the heads I do believe.

QWKSNKE · 12-07-2005, 06:18 PM

Quote:

Originally Posted by joker

They have gt40 stamped on one end of the heads I do believe.

Actually I think it is "GT". Can't remember but I believe it is either stamped next to one of the lower head bolt holes or in the rocker arm/valve spring valley. But there is also a way to tell by a casting line on the fron of the heads

joker · 12-07-2005, 06:21 PM

Quote:

Originally Posted by QWKSNKE

Actually I think it is GT. But there is also a way to tell by a casting line on the fron of the heads

Your right Lee, it is just gt that they have stamped on them. I knew it was sonething like that but didnt remember.

natedawgg94 · 12-08-2005, 03:10 AM

the gt heads have casting #'s along the lines of F3ZE-AA or F77E-AA and have either 3 or 4 lines on the end which has something to do with the time of casting from whati've been told......

natedawgg94 · 12-08-2005, 03:18 AM

Quote:

Originally Posted by QWKSNKE

Actually I think it is "GT". Can't remember but I believe it is either stamped next to one of the lower head bolt holes or in the rocker arm/valve spring valley. But there is also a way to tell by a casting line on the fron of the heads

some have the gt stamped on the right corner just under the valve cover and if the cast # starts with F and ends in AA so i've been told and have seen on other heads off different boards.

QWKSNKE · 12-19-2005, 07:52 PM

Stumbled across this today on the corral
Explorer/mountaineer 5.0 head

Lightning/Cobra head

12-07-2005, 02:01 PM	#1
myillwillinc Senior Member Join Date: Mar 2005 Posts: 593	Re: wtb gt40 irons how do you tell if they are gt40 and not stockers? i have some in my garage i was told they were but i don't even have a 5.0 anymore so i need to clean out my garage... __________________ 5.4 project in the works..... link: http://www.illwillinc.com/97mustang.htm PowderCoating and Anodizing: http://www.illwillinc.com/

12-07-2005, 05:16 PM	#4
joker Friends Join Date: Dec 2004 Location: Southern Colorado Posts: 2,452	Re: wtb gt40 irons They have gt40 stamped on one end of the heads I do believe.

12-08-2005, 03:10 AM	#7
natedawgg94 Senior Member Join Date: Apr 2005 Location: Ohatchee, AL Posts: 713	Re: wtb gt40 irons the gt heads have casting #'s along the lines of F3ZE-AA or F77E-AA and have either 3 or 4 lines on the end which has something to do with the time of casting from whati've been told...... __________________ 1994 Cobra Pace Car #365 of 1000 light mods 1994 mustang GT 3.55's, 331 stroker, 75mm tb, 75mm maf, mac h pipe SOLD (ole yella u will be missed ((>>. Rubbing Is Racing

12-19-2005, 07:52 PM	#9
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: wtb gt40 irons Stumbled across this today on the corral Explorer/mountaineer 5.0 head Lightning/Cobra head __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy