Need help fast? GT-40 or P

92Rustang · 02-24-2001, 07:25 PM

Here is my problem I can get a set of gt-40 iron heads for about $430. I need to know if I will pass emission with these heads or should I go with the p heads that I know are legal. Also CCM has a motor they claim is 340hp for 2199? This seems high for a stock 302 block , P heads, and a cam. What should I do I need to stay smog legal.

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Check my site for mod
www.fordmustanggt.com

Unit 5302 · 02-25-2001, 02:30 AM

GT-40 irons came stock on the 93-95 Cobra's. Yes, they'll pass emissions.

You don't say what cam and what else has been done, but I'd tend to agree about the 340hp claim being very high for the GT-40P heads.

[This message has been edited by Unit 5302 (edited 02-25-2001).]

S Howard · 02-25-2001, 06:15 PM

If you refer to FRPP book pages 4&5 you will note that M-6007-XB3 or XE3 is 345HP GT-40 AL block--$3500. The 270HP M-6007-A52 with GT-40 heads and valvetrain, racing cam etc lists for $2795. Granted that these prices are slightly higher, my experience suggests only 10-15% higher. Seems $2199 is a little low or the 340 HP claim is a little high.

jonnyk · 02-25-2001, 06:18 PM

Keep in mind that's rated with an X303 cam (pretty agressive) and 10.5:1 compression (quite a lot with Iron heads). I'd believe the 340 hp with the right setup (intake, exhaust, etc.)

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1991 LX Hatch 5.0L

92Rustang · 02-26-2001, 10:50 AM

Thanks for the help guys. The cam is the x303 andc the motor is form central coast mustang AD in 5.0 Mustang mag. I have figured for new p heads with lifters, cam, gaskets,headers, shipping, and rockers I will spend about 1500 hundred. For the same with setup with used gt-40 heads about 1200 hundred. Then add in the short block for about 8 to 9 hundred?(have not checked locally yet) I'm looking at spending about $2000 to $2500. Plus the long block is assembled and ready to go. Just slide it in and go.

I need to let the guy with the heads know today if I want them. What would you guys do ? Thanks again for the help.

------------------
Check my site for mod
www.fordmustanggt.com

Unit 5302 · 02-26-2001, 01:35 PM

Remember you'll need special headers to run P's. I think you can get them from MAC.

02-24-2001, 07:25 PM	#1
92Rustang Registered Member Join Date: Feb 1999 Location: Smithton, IL, US Posts: 215	Need help fast? GT-40 or P Here is my problem I can get a set of gt-40 iron heads for about $430. I need to know if I will pass emission with these heads or should I go with the p heads that I know are legal. Also CCM has a motor they claim is 340hp for 2199? This seems high for a stock 302 block , P heads, and a cam. What should I do I need to stay smog legal. ------------------ Check my site for mod www.fordmustanggt.com

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02-25-2001, 02:30 AM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	GT-40 irons came stock on the 93-95 Cobra's. Yes, they'll pass emissions. You don't say what cam and what else has been done, but I'd tend to agree about the 340hp claim being very high for the GT-40P heads. [This message has been edited by Unit 5302 (edited 02-25-2001).]

02-25-2001, 06:15 PM	#3
S Howard Registered Member Join Date: Jun 2000 Location: Orlando, FL Posts: 195	If you refer to FRPP book pages 4&5 you will note that M-6007-XB3 or XE3 is 345HP GT-40 AL block--$3500. The 270HP M-6007-A52 with GT-40 heads and valvetrain, racing cam etc lists for $2795. Granted that these prices are slightly higher, my experience suggests only 10-15% higher. Seems $2199 is a little low or the 340 HP claim is a little high.

02-25-2001, 06:18 PM	#4
jonnyk Being stroked is great Join Date: Oct 1998 Location: Alberta, Canada Posts: 772	Keep in mind that's rated with an X303 cam (pretty agressive) and 10.5:1 compression (quite a lot with Iron heads). I'd believe the 340 hp with the right setup (intake, exhaust, etc.) ------------------ 1991 LX Hatch 5.0L

02-26-2001, 10:50 AM	#5
92Rustang Registered Member Join Date: Feb 1999 Location: Smithton, IL, US Posts: 215	Thanks for the help guys. The cam is the x303 andc the motor is form central coast mustang AD in 5.0 Mustang mag. I have figured for new p heads with lifters, cam, gaskets,headers, shipping, and rockers I will spend about 1500 hundred. For the same with setup with used gt-40 heads about 1200 hundred. Then add in the short block for about 8 to 9 hundred?(have not checked locally yet) I'm looking at spending about $2000 to $2500. Plus the long block is assembled and ready to go. Just slide it in and go. I need to let the guy with the heads know today if I want them. What would you guys do ? Thanks again for the help. ------------------ Check my site for mod www.fordmustanggt.com

02-26-2001, 01:35 PM	#6
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Remember you'll need special headers to run P's. I think you can get them from MAC.