1966 427/425 cylinder head Casting Numbers

[John M.]

I just did a valve adjustment on my 1966 427/425 and wanted to confirm the casting #'s I found along with alpha numeric date codes. The Casting numbers on both heads is 3873858. The Drivers side head has a casting date of B266 and the passanger side is B256. My engine stamp pad is T030IIP and my cars final production date according to NCRS was March 10th 1966. Does this all sound correct!!

[John H.]

Re: 1966 427/425 cylinder head Casting Numbers

I just did a valve adjustment on my 1966 427/425 and wanted to confirm the casting #'s I found along with alpha numeric date codes. The Casting numbers on both heads is 3873858. The Drivers side head has a casting date of B266 and the passanger side is B256. My engine stamp pad is T030IIP and my cars final production date according to NCRS was March 10th 1966. Does this all sound correct!!

John -

Works for me.

[Ronald L.]

Re: 1966 427/425 cylinder head Casting Numbers

John,
Perfect, as we see with these early BB cars, there is not a lot of room from casing to finished engine.