My '72 Overlander International stock weight, with one pull-out bed in back (is that called a twin or double?), according to my owners manual (I think), was 4,550#. After my remodel, using minimalist methods of reconstruction, it weighs 4,380#. About 400# of this is on the tongue/hitch, not the axles. That means that 3,980# is being supported by the twin axles, which was useful info when I replaced the axles. Hope this helps you in your project. -tim
ps: the lower tongue weight may be from my using gas-grill size propane bottles, not the big ones.