I was thinking about adding drawers, Blocking the heater vents isnt an issue, they are just for looks, I noticed when taking the panels off that the vents arent used any more due to the rear climate control unit, which has its own air ducts the two vents just above the bed rail and also several vents located in the raised top.
I decided to mount the bed in its current location for a few reasons:
~I plan to have a small bar sink, (and later on a stove) to simplifly the plumbing for the sink i decided to locate the sink in the back of the van due to there already being a nice hole in the floor that the ac and heating lines run through for the rear ac unit
~I'm also designing a removeable top bunk, for my son or brother to sleep on when I happen to have one of them along for the trip. moving the bed forward located the top bunk forward of the driver side rear pillar which houses the ac and heating vents and inconvinently sticks out about 3" at the top window line.
as far as the 4x4 goes... the more I see the builds done on here........ The more I want one.... They are awesome. Truly amazing machines.