Pulley - 74 Duster 225 Slant Six

Everyone, thanks for all the input and information. I'm away this week, but will post pictures of the compressor once I get back. The car was originally from Michigan, where it is possible it didn't have AC, then moved to Florida where it was a weekend car for an elderly couple who maybe installed the AC. They may have installed the wrong pulley when they replaced the WP. It has had 4 owners.