1978 P35 Diesel Short Bus Conversion Van...Tall Roof! - $12000
https://eugene.craigslist.org/cto/d/diesel-short-bus-conversion/6706123766.html
Possible to finish the 4x4 conversion?
"I swapped in a 6.5L non-turbo motor out of a 1995 delivery van. It is not a hp monster, but it is extremely reliable and gets great mpg (over 20mpg) which is what you want for a traveling bus! It is mated to a 700r4 overdrive transmission, which means you can do freeway speeds.
It is built on a p35 van chassis, not a truck chassis: So the front section where you sit is very open and spacious, compared to most short buses where you have to duck into the driving position. You can see everything as you cruise.
I left the 4x4 transfer case on the transmission so that you could swap in a straight axle up front and make this into a 4x4 P35! I have only ever seen or heard of one of these! Have all the 4x4 linkage and levers for conversion that comes with it."