I am thinking about buying a new fan belt but don't know which type I want. The choices seem to be leather, rubberized fabric, or endless. What should I buy, not worrying about being 'CORRECT" ?
Get you an endless fan belt. It will last a very long time. I have them on my T's. Snyders and Langs sell them.
The type I bought is a 23” BELT (1909-1916): Gates Vulco 811, but the last time I tried to find one it wasn't available from the local parts store. Unless you live near a Model T parts dealer, you'll need to have one shipped.