Closed chamber?

[Animal Lawyer]

Can anyone tell me are these closed chamber heads? Seller says they are but can't get me/find casting #. 

 

[Stanglover]

That date code, it looks like 4M23, is that correct? If so no. If it's a 2M23 that would be Dec 1972 so again no. They don't look like CC heads in the pic, but honestly, not the best shots to be able to say for sure, I could be wrong. The casting number is under the inlet ports. Are these pics sent you by the seller? perhaps ask for him to clean up and retake some better pics.

I was able to save and trim one of the chambers. It does look like a CC chamber

 

[Hemikiller]

Those are Windsor heads, not Cleveland. 

There's a guy on LI advertising on FB marketplace that has a set of chamber heads. Shows in Calverton, over by Riverhead. 

https://www.facebook.com/marketplace/item/408324776969484/?ref=search&referral_code=undefined

 

[Stanglover]

Those are Windsor heads, not Cleveland. 

There's a guy on LI advertising on FB marketplace that has a set of chamber heads. Shows in Calverton, over by Riverhead. 

https://www.facebook.com/marketplace/item/408324776969484/?ref=search&referral_code=undefined

My bad, you're right. Not Cleveland. I should have looked at the valve springs.

 

[Animal Lawyer]

There's a guy on LI advertising on FB marketplace that has a set of chamber heads. Shows in Calverton, over by Riverhead

I've messaged him 3 times, never received a response.

 

[Carolina_Mountain_Mustangs]

Here is great reference place for casting #'s and what you have. http://www.mustangtek.com/