8BA Flathead fan belt widths

[V8 Bob]

Is that just cars?

The narrow 3/8" belts and offset pumps were used on USA '50-'53 Ford and Mercury cars. All trucks used wide pump belts up through their end of production.

 

[glennpm]

If you "GOOGLE". "How to select an auto fan belt?" lots of very helpful info. appears about what you are asking. Really helpful.

Good table here:

https://texasbelting.com/pages/how-to-identify-a-belt