Two things I want to remind you of, one I have never owned a Fry, and second, for some reason I have decided my next big project (after the book is published) is to gather every piece of information I can about the Fry Mae West pumps. Everytime someone here posts a picture of any part of the pump I put it in a file.
George I can't really answer your question, someone who has owned a number of these pumps is better equipped to answer it.
Other than identifing the parts used in each of the pumps, I am going to really work on the Serial Numbers on the ID tags to try and determine when each of the pumps was made. I will be asking everyone to send me the Serial Number, which model, and when they think the pump was made. Not now, later.
Author, 1st & 2nd editions of Gas Pump ID book, 3rd edition is now available at www.gaspumpbible.com
Air Meter ID book also available