I am wondering if the lack of any depression in the combustion chamber near the intake valve has caused the problem of that area to cook, as well as cooking the valves.
I do have two 1954 heads (913) which I believe are unmolested and there is a significant depression near the intake valve which my '56 (848) head is lacking.
I am going to take those to the machine shop tomorrow so that he can measure the height of these to compare to the height of the '56 head to determine how much has been removed from it over the years.
I'm struggling to picture the depression Carl is talking about, and to understand how it relates head-shaving. Could someone explain or even better, post a picture?
