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And, yes, it is cast in. Thank you

I found the date code 2j14 stamped on both of my 406 heads, to go along with the c2se 6090c code. I believe that to mean they were cast or manufactured 10/14/1962. Also, on the top face of the head, on the left side of each head is the number 63. Does anyone know the significance of that number please ?

Thanks

I bought a 390 bored 60 over with many hi-grade performance parts that I want to put in my 64 Galaxie. One of the components were a matching pair of 406 heads, c2se 6090c. They have been ported and go with my f427 intake. The heads have adjustable rockers and heavy duty valve spring and cups. I believe these to be original 406 heads in excellent shape. I am wondering what kind of compression rating I would be looking at. I have hydraulic roller cam and lifters as well.

This is my first FE build so I'm a bit new with this.

Thanks