The oil filter comes from Racor. I think that Racor bought out Oberg but I don't know for sure.

The belt driven distributor is just an easy way to solve a few problems. It gets the distributor out of the way of the valve cover, it makes the plug wire routing a little easier to deal with, it makes it easier to prime the oil pump and the big cap reduces cross fire. On the down side, it gets in the way of the thermostat housing.