[69 Limelight]

You are exactly right. Looked in the 2 Ames Catalogs (G34 & G35) I have and the picture is you're Model A. Hadn't looked at AC components in their catalog in years but last time I did they pictured the Model B. (I'd say it's same compressor just different clutch.) I had such good service out of "Old Air Product" that I bought all my AC stuff from them back in 2009. At that time the Pro6Ten was fairly new and every picture I saw looked like Model A.

I don't recall if you said if you have cycling system or POA system. I have POA system so once AC is turned on the clutch stays engaged which I think would be easier on clutches.