Here is the completed project all closed up. The big access panel is for the heater. The new cubby hole helped routing the heating duct and now provides storage. Two batteries and the kerosene (or diesel) tank are under the passenger seat. The only evidence of the heater is the thermostat just forward of the cubby hole and just barely visible in front of that is the heat register (outlet) that blows warm air primarily into the V berth.