I bought this car in January, been building it since. I’m trying to figure out what heads are on it.

I put an LS6 intake manifold and long tubes on it but didn’t pay attention to the ports on either side.

It’s getting tuned on the 16th and I’d like to know what heads are on it. Not that it really matters but I’d like to know. Any help is greatly appreciated. Thanks

 

Cathetral ports? All I see is a date code. C27 9. My guess is they were made March 27th 1999 or 2009

 

Cathedral heads but without seeing the exhaust ports or being able to measure the valves or combustion chambers it's anyone's guess. Wait just a minute I see an 853 casting number on the back side.

 

Winner winner catfish dinner!

 

Thanks but I still don’t see it. I must be blind, thank you.

Any idea what they would mill the casting # area?

 

853, clear as day in the 5th picture. Look all the way top left.

 

.they didnt mill . The casting is only on 1 side of each head

 

Like this...

 

I’m a , I swear I looked all over…… Fresh eyes I guess 😂😂😂😂

Thank you all