I have come across a variety of pulley options on Y-Block Dampers and Accessories (alternator, fan, air compressor, and power steering). I tried searching the site to make sure this subject had not been previously addressed and did not find anything specific.  Do the dampers and accessories come in two widths (3/8" and 1/2")? I would assume the damper would determine what size pulleys should be used. In my search, I have seen some engines with both, which I would think could be a problem for belt wear. Some of the vendors for air compressors, alternators, and power steering pumps I have came across made no mention of an option when it comes to pulley size (width). I'm looking for some help to understand this. I do believe its possible to swap out any of the pulleys, damper being the most expensive.

Darrell Howard Whitefish, MT Outlaw 56 Ford F-100's