I have two E350s; one is a 1984 that I modified with a dual wheel rear and a 94 IDI turbo engine. It weighs 9K#. The other is a 2001 PSD. It weighs 12K#. It used to be a bus, is now RV.
Both have disk front brakes, and the same DANA 70, dual wheel rear. The 9K rear has drums and the 12K...