1964 289 HO Heads - Ford Mustang Forums
 
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post #1 of 7 (permalink) Old 12-15-2009 Thread Starter
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1964 289 HO Heads

Will HO Heads fit a 289 from 65 or 66?
What would be a ball park cost to get the heads redone?
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post #2 of 7 (permalink) Old 12-15-2009
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How can you tell they are Hi Po heads?

I believe they should fit any 289 block, but I don't know what the cost of refurbishing is.

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1992 Bronco - 302 EFI Auto
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post #3 of 7 (permalink) Old 12-15-2009
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I thought he meant Hi-Po heads when I first read it but think he's talking about 5.0L HO heads. Have to be careful in matching what ever he has. Them 289's could vary a bit in their stock piston availablity, especially after how many years.
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post #4 of 7 (permalink) Old 12-16-2009
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The 302 heads and the 289 heads are identical with the exception of the combustion chamber. The combustion chamber is larger than the 289 heads. But i'm not quite sure how that would effect it all, you'd lose compression, i know some people put the 289 heads on their 302 for better compression..

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-68 302 4bl 5.0l.
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post #5 of 7 (permalink) Old 12-16-2009 Thread Starter
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Sorry, they are HiPo heads off a '64 289 and from the code on the heads it's telling me they are HiPo's. I have a '65 block and a '66 block and was thinking of getting these heads and flipping one of the 289's to a HiPo.
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post #6 of 7 (permalink) Old 12-16-2009
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They might have the same casting numbers but there are several with that same casting number. they should have the screw-in studs, machined pockets and cups for the valve springs. that all can be faked. There is another casting mark on the heads, think it's a number in a circle that tells for sure. Veronica knows the right code. Compression ratio on them motors could be 10:1 or even 11.6:1, way too high for todays gas.
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post #7 of 7 (permalink) Old 12-16-2009
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Yes they will fit any 289 engine. You wont have to change anything. Since they are hipo heads, they will already have screw in studs so if you get them redone, the will most likely deck them and do a valve job and install new springs. Wont be that expensive unless you have them install hardened valve seats. Heads back then did not have hardened valve seats. When the use of unleaded gasoline came along, so did hardened valve seats. It is recommended to have them. The opinions go both ways here on this issue.

You would be fine without them as long as you do not "get in to it hard".

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