Used C3OE Heads

Here is an Ebay auction for a pair of used C3OE heads by Ebay member "hertz1966" with a Buy-It-Now of $1,200.00:

Used pair of 1963 289HP cylinder heads,

Cast C3OE, Both heads are date code matched to 3C6 (March 6, 1963)

Both heads have the same identifier of 21 on the corner of the heads

It appears they have not been ported or polished.

One valve chamber has damaged. It appears a valve spring broke and the valve was loose and caused damage on one of the valve chambers. Will need to be repaired. See pictures attached.

Shipping from Livermore, CA 94550.

Please let me know if you have any questions.

1963 - 1967 289 HiPo Heads K Code Shelby Cobra Mustang | eBay

-Fred-

Quote from C6ZZKGT

Here is an Ebay auction for a pair of used C3OE heads by Ebay member "hertz1966" with a Buy-It-Now of $1,200.00:

Used pair of 1963 289HP cylinder heads,

Cast C3OE, Both heads are date code matched to 3C6 (March 6, 1963)

Both heads have the same identifier of 21 on the corner of the heads

It appears they have not been ported or polished.

One valve chamber has damaged. It appears a valve spring broke and the valve was loose and caused damage on one of the valve chambers. Will need to be repaired. See pictures attached.

Shipping from Livermore, CA 94550.

Please let me know if you have any questions.

1963 - 1967 289 HiPo Heads K Code Shelby Cobra Mustang | eBay

-Fred-

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The listing for this pair of used C3OE heads was ended by the seller August 21, 2026 with the following explanation "This listing was ended by the seller because the item is no longer available".

-Fred-