So I've done a search, looked through my library of materials and talked to some knowledgable friends. However, I cannot find a definitive answer for what each of the markings on the heads represents. Sure, I got it on the part number and year and even the RR350, but what do the other markings mean? Every book and person knows what the different markings on the cylinders mean, but what about the heads?
Here's a pic of the markings I am asking the Pelican brain trust about for reference. Thanks in advance to pointing me in the right direction to find out. I'm thinking this might be a good tech question for our next PCA event...