School me about my heads

[mechted]

I ran the head casting number on Mor-tec and came up with this:
"3931063....68-69...oval..CLOSED..396, 402, 427, 101cc chamber"

This verifies what PO told me about the engine "396 from a 69 Chevelle."But i dont know what the rest of it means? (Oval, closed, 101cc) Anyone know what exactly this means? are these "good" heads? Can you explain this to me please

 

[RustBuket]

101 is the size of the combustion chamber in cubic centimeters. Oval is the shape of the ports. I believe oval ports are good for low end torque and rectangular are better for high RPM hp. I don't know what closed means.

 

[sled_dog]

closed chamber. Not good for flow but usually higher compression. Not big block knowledgeable to say how 101cc will be.