Looking at a pair of 302 heads with E6AE casting numbers. I think they are the 64cc chambers, not sure on the valve size. Any info would be appreciated.
I think those are the heart shaped chambered ones which are not desirable for performance if I remember correctly. I think they use the stock valve size common to all 302 heads but have rather shrouded valves due to the combustion chamber shape. I may be wrong and haven't discussed this topic in 10 years so maybe someone else can shed more light on the situation.