[dandascott]

I am in the process of assemblying a 427 s.o. from parts that my father n law accumulated in the late 60's but never assembled. Among these parts are cast iron heads with the casting C5AE-P. I do not believe that these have had any modifications. I am trying to decide whether to proceed with these heads or buy some new aluminum heads. Any advice ? Can anyone tell me anything about the casting number ?

Thanks,
Darrell