Tango - Thanks for all the info. I have been researching like crazy... I'd love to go with a 4BT since it is very close in weight to the original engine of the bus. A 6BT would also be great for the extra power and towing capacity, since I'll likely tow a small car behind for "running into town"... My wife and I plan to make the bus our retirement and travel the nation being camp hosts and just living like nomads. My only concern is whether the 6BT will fit, and it is about 250 lbs heavier... We'll see.
I had some time to tinker with google sketchup... I did a total hack job, but it's good enough for me and the women I date ;)
A few things to note... I did this in about 15 min, it's not totally proportional, or exceptionally pretty. It does accurately represent the size of my bus and the components which are possible.
The two slabs in the "back" (aka, passengers side) are bunk buds. The top bunk will be hinged so that it will drop down and be a bench seat while traveling or a couch for chilling and reading a book. I will put 2 ARB refrigerators (1 fridge and 1 freezer) and a storage box of some kind underneath the bottom bunk on heavy duty slides of some kind.
The table will probably be made of aluminum and will basically be a shallow box. The cooktop will be down inside the box, and the lid will open toward the front and back of the bus to reveal the cooktop and provide a workspace on either side of it. When parked/camping, the captains chair will swivel around to be seated at the table.
The big wood unit in the back is the "master bedroom", which is a full size (double) bed with shelving at the head and floor at the foot (for kicking off your shoes). So obviously there would be a door (probably a split pocket door) to enter. There is also a back door to the bus, I will probably build a 2' - 3' back patio that steps down a lot more gracefully. SO it will be a master bedroom with balcony... spoiled
There will be a fair amount of overhead cabinets.
There are many other commodities which I'm planning that weren't worth sketching... outdoor shower head, custom onboard water heater with temp sensor and pump (along the longs of the onboard showers jeepers use), A/C, 24V ([12v x 2] x 2) battery bank with solar panel charging system. There are others, I don't remember them all at the moment.
Also, the toilet closet will be partially over a wheel hump, so it will likely be up on a platform a bit. Which could make it more comfortable to use, but maybe I'll put some stirrups in there to aid in "assuming the position"...
Here are a couple of the parts I'm planning to use...
Stainless steel deep sink
ARB 12/24/110V fridge/freezer
stainless steel cooktop
soap dispenser mounted on wall next to sink
paper towel dispenser mounted by sink
Edit: BTW, if anyone has suggestions/criticisms, I'd LOVE to hear them. I like this floor plan a lot, but I'm still tweaking/refining it. I'd live to find a way to incorporate this, but I'm not sure where/how:
Camp Chef Camping Range