No problem! GMB 130-2835 is the 'light duty' pump, used on pickups and many medium duty V-6's. The big difference between this pump and the 'heavy duty' is just the way the pulley mounts. Light duty has the flange with 4 threaded holes, heavy duty has a keyed threaded shaft with no flange. The bearings may indeed be larger too, the shaft diameter is pretty big. Here is a link to a heavy duty pump for sale on Ebay (no connection to seller):
https://www.ebay.com/itm/175440758276