Looking at 68/69 455 with Ca heads. Can someone explain the different from C heads?
Thanks
Could not find anything on 442.com

 

Any chance they're Ga heads?

 

No difference between C and CA.

 

I thought that it was a provision of some sort like a engineering change but not positive

 

Owner says Ca, will be taking a look tomorrow. Should have a better idea.

 

Correct. There are CA and DA heads in existence. I don't know that anyone has ever been able to discover the exact differences from C and D heads. This may be something like a change in the casting cores for the water jacket, for example.

 

Thank Joe, never heard of or seen Ca heads before this.