I am in the process of installing a 1974 Westfalia P27 interior into a 1979 Bus less the pop up roof.
I found this bus on Vancouver Island in the early spring. It had some engine issues, but it was virtually rust free, having spent most of its life in the San Jose California area, and had a dealer install a/c unit. Here we are at the ferry terminal at Swartz Bay on the ride home.
Having resolved most of the mechanical issues - oil cooler replacement, fuel/vacuum/gas tank hoses and seals etc. and getting it through AirCare, I set out looking for a doner camper interior.
I subsequently found one in Maple Ridge at the Reydaville bus farm- a 74 Westfalia with a P27 interior with a working fridge and stove.
I decided to remove the spare tire from the rear to the front bumper.
After cleaning and painting the rear floor area I installed a 12mm plywood floor and tan carpet. The various pieces of cabinetry went in without difficulty as you can see. I did remove the water tank and turned the sink around so it is now close to the window. This should provide a little more interior storage.
Found some front seats from a Vanagon. These will get recovered at some point in the same material as the rear. The upper bunk material is like new and should be suitable.
I still have plenty of work to do, including plumbing, electrical, propane tank and hoses, water tank under the floor, curtains, rear headbanger closet, jalousie windows and BN4 gas heater. The roof and window areas also need to be repainted in the correct Mexico Beige.
In the meantime it's a driver and when the weather cooperates I can get a bit more done. FYI.