Well, today the top to base transfer was completed. I put the base on a my old SnapOn creeper and wheeled it under the front of the camper. Lifted the camper off the old base, which I partially cut up to pull out from under. Slid the new base underneath and lined up the top with the base. That's all it took... ;-)
Tools used: High Lift jack, hydraulic floor jack, various shoring wood, saw horses, jack stands, sledge hammer, flat crowbar, newly repaired SnapOn creeper, 800mg Ibuprofen and a peanut butter sandwich. ;-)
It's a huge milestone for this project, yee-hah!
Next: rebuild the roof. I'll add new Luan and strengthen it for the addition of a roof rack.