What's this for?

[RHClarke]

Mark,

My HUP has two holes drilled thru the floor behind the drivers seat and just to the rear of the divider. I presume that the holes were for a space heater.

I have an antique GM space heater from another vehicle (authentic to CMPs or not, I don't know), and it has two pipes attached to it. Both pipes fit into these holes, which leads me to believe that this was the location of the heater. If you get a chance I would like to review the references you looked at for HUP configurations.

An enterprising former owner installed a wood stove near the side door with a stovepipe pushed out thru the sliding hatch cover. Judging from the heat damage that my divider, interior covering and metal suffered, I will bet that the back of the truck was quite cosy when the stove was stoked.

Good luck with the tear down. I am looking forward to more photos of your interior as you strip it down.

Cheers,

RHC