Put the T85A top kit on the axles with 6 holes showing from the rear.
Put the HUP top kit on with 8 holes showing from the rear.
Nelson axles with HUP Top Kit
Weight is 6700# with spare tire 
Rocky Mountain Crane Service Logs
Rocky Mountain Crane Service Logs
Put the T85A top kit on the axles with 6 holes showing from the rear.
Put the HUP top kit on with 8 holes showing from the rear.
Weight is 6700# with spare tire