Not Ranked
You can tell by looking at the rockers, the head, and the shoulder on the stud. The rockers for non-adjustable are rail rockers. The rails ride on the sides of the stems to keep them centered. The older heads had slots in the heads that kept the push rods in the right place and no rails on the rockers.
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Wayne
"Everything is alive. If you get angry at a vehicle or the trans, it won't fix until you apologize and say you are sorry." "The vehicle always knows what it is doing and what the cause of it's bad feeling is. If you ask it humbly what the problem is, it will tell you. Then you and it will both be happy."
Gil Younger
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