1965 mustang 6 cylinder, Cylinder Head casting number - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 12-24-2011 Thread Starter
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1965 mustang 6 cylinder, Cylinder Head casting number

Hello everyone and merry christmas!!

My issue is I have a 1965 mustang 6 cylinder 200, that im getting rebuilt. When the shop took my heads off they showed me 1) my heads were cracked and 2) they were surfaced to much before. So I've been looking for heads and I have found some but the guy from the shop told me I should find one that matches my casting number which is C50E-6090A. The heads I found were off a 1965 mustang 6 Cylinder 200 or so the guy tells me and have the casting number of C6DE-6090B

I want to know 1) how to read the casting number if anyone has this info?? 2) Does the casting number make a difference?? 3) If I could use these heads i found based off the info above??

Thanks and I'd appreciate the Help
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post #2 of 9 (permalink) Old 12-24-2011
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C5 is 1965, C6 is 1966, it will work fine. Someone has milled the head to gain compression, either lost due to not being able to find the original head gasket which is a lot thinner, .027 and hard to find, or simply to increase compression ratio. Replacing with a newer, thicker gasket, new head will have to be milled to make up the difference in thickness or lose compression. Stock combustion chamber measures 51.5cc for 1965 200ci engine.

66 Coupe 200ci I6 Stock
66 Bronco half cab 203ci I6, CI aluminum Head and intake, Holley 390cfm 4V, Clifford header, Isky cam, KB pistons 9.7:1 comp, DSII ignition
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post #3 of 9 (permalink) Old 12-25-2011
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It may not be such a bad idea, to drop the compression a tick, since gas nowadays has a lower octane rating than gas back then which was 93-95 octane, which is premium today. I run regular in my 289 with 9.5:1 compression, and do not have any knock. My 2 cts. Good Luck.
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post #4 of 9 (permalink) Old 12-26-2011 Thread Starter
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Thanks for the help,

If I decide to go with these 66' heads will I still be able to use my same carburetor?? and will it run the same as if I the stock 65' heads on it?? Thanks for the help and I did find heads with the same casting number from a parts warehousebut they said it would cost me 250$ which I think is to expensive. Which is why im contimplating using these 66' heads which I can pick up for 50$
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post #5 of 9 (permalink) Old 12-26-2011
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No problems using the 66 head.

66 Coupe 200ci I6 Stock
66 Bronco half cab 203ci I6, CI aluminum Head and intake, Holley 390cfm 4V, Clifford header, Isky cam, KB pistons 9.7:1 comp, DSII ignition
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post #6 of 9 (permalink) Old 12-26-2011 Thread Starter
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THANKS!! thats good news to hear

When I go see these 66' heads should I take my stock 65' heads to make sure everthing lines up?
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post #7 of 9 (permalink) Old 12-26-2011
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Can't think any reason why, but if it would make you feel better, go ahead.

66 Coupe 200ci I6 Stock
66 Bronco half cab 203ci I6, CI aluminum Head and intake, Holley 390cfm 4V, Clifford header, Isky cam, KB pistons 9.7:1 comp, DSII ignition
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post #8 of 9 (permalink) Old 12-27-2011
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Make sure to inspect the replacement head carefully. This head design is infamous for cracks between the valve seats and in the intake plenum. It took me 5 tries to find a good piece.

discbrakeswap.com
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post #9 of 9 (permalink) Old 12-28-2011 Thread Starter
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ok thanks a lot for the help
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