So to come back to this, does anyone know a way to tell the difference between a regular 904 and a wide band 904? I decided this would be good for my V8 upgrade.
Not a whole lot. As I recall the wider band was used behind the 318, and that's about all. Friction plates, steel plates, gasket set, etc. all the same in the 904. The drum might be a bit wider, but I don't have that information at hand.
