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Old 01/18/2006, 09:45 PM   #1
calspcl
 
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Location: Seattle, Wa
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390 or 428 heads?

Do any of my fellow 390 GT/CS'rs know what the date code is on these heads that I found for sale in Olympia Washington? He states they are 428 heads. His add reads;

"Came off good running 428 motor.Casting numbers-C8AE-H 9E2?"

Is the (9E2) 1969, May, 2nd? What would tell me they are 428 or 390 heads?

Thanks!

1968 390-4speed GT/CS "Acapulco blue is beautiful"
2001 F-350 diesel dually flatbed hauler
1970 bronco
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Old 01/18/2006, 11:29 PM   #2
somethingspecial
 
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According to the casting # book, C8AE-H in '68, was for the GT390 or the GT500.(which should have had a 428).
valve size is: int.2.02 exh. 1.55
A 428CJ head should be #C8OE-N, with valve sizes at: Int. 2.09 exh. 1.66
if the # you showed was a date code, you are correct at May 2nd, '69 as the casting date. Good Luck, Mike

Mike Jewell
GT/CS Registrar
mikej@bigbytes.com
If at first you don't succeed, Parachuting is not for you!!!!
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Old 01/19/2006, 08:39 AM   #3
PB GT/CS
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Owner 65 Cobra 427 S/C,

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Just a note, both 390 and 428 are FE engines. Heads will transfer from one to other. Several styles of heads for FEs were made during the period. The GT heads were one of the rarest as they were necessary for the FE to fit in the Mustang engine compartment. They shoot the exhaust more downward than do other heads of the time. they are Difficult to find. If you are looking to retrofit a Big Block in a Mustang, you will need these heads to make it fit. Finall word, the GT heads were not very effecient. That is why the 289/302 hipo cars were nearly as fast in the quater as were the big block cars. But i can tell you this, since I own a Big Block car and half of a small block car, that big block with a little cam in it really sounds great!!

Brian

Part owner with PF Slim in 1968 Cal/Spec, full owner of 1965 Cobra SC 427 Replica
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Old 01/19/2006, 12:16 PM   #4
calspcl
 
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Location: Seattle, Wa
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Unhappy

Thanks for the info you guys. For some reason the site isnt recognizing my password today or I would have logged on with this response.

Thanks again, Dan

1968 390-4speed GT/CS "Acapulco blue is beautiful"
2001 F-350 diesel dually flatbed hauler
1970 bronco
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Old 01/19/2006, 12:17 PM   #5
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Location: Seattle, Wa
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Wink

How bout that, I was logged on. Quess the site is smarter than me....

1968 390-4speed GT/CS "Acapulco blue is beautiful"
2001 F-350 diesel dually flatbed hauler
1970 bronco
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Old 01/25/2006, 12:31 AM   #6
J.Bart
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390 gt heads have smaller ports than cobra jet heads and have 14 bolt pattern on the exhaust, also smaller combustion chamber. the c8ae-h heads came both in gt and standard exhaust bolt pattern.
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