I am an F-Code newbie but I recently purchased a 57 F-Bird clone and I need some help regarding identifying the parts.  I should point out that this car was last touched in 1974 according to the previous owner, who I know well enough to know that he couldn't tell a lie to save his life.  What I do know is that the engine and supercharger set up came out of an F-Code passenger car.   That being said, I have had some conflicting information and I was hoping that some of you experts could help me out.  

Both of these heads have the EDB-D casting numbers on them near the intake manifold ports however the combustion chamber surfaces have casting codes that are not identical.  What if anything can you tell me based on the pictures?  Are there date codes on these?  If so where and how do I read them. What do the markings indicate? What are these heads worth?  What is an intake worth, or correct carburetor?  What is the whole package worth?  

While it’s not impossible that the first two digits are transposed, it’s unlikely.  Even transposed, it puts the two heads being made two months apart making at least one of the heads not being a member of the original pair.  It’s possible neither head is original to the other ‘F’ parts considering how many of the early supercharged heads initially cracked.  For now I’ll go with the 1958 head simply being a replacement head.  You might check to see if both heads are posted or not as that may be another clue as the 1957 head could possibly be unposted and the 1958 head is.  Don’t let the date codes deter from the fact that both heads are the EDB-D heads and having a significant spread in the date codes is not going to be a detriment to their value.

Here’s a link to an older thread on how to identify posted heads.
http://forums.y-blocksforever.com/FindPost6764.aspx 

Lorena, Texas (South of Waco)