Thats a big van & a gasser, if its just you perhaps a smaller van.Approaching $4k I think a diesel isnt out of the question or a camper style van.
@highwayman your on point.
I have narrowed my own search to an awd hightop astro/safari (so difficult to find it seems.)
you mentioned in another thread... made me reconsider.
Or a 7,3 nonturbo ford diesel....(has been my holy grail for a low mileage campered out e series diesel lol) although in the E series conversion vans I also am wondering if the inline six they used to produce would be a good deal for a gasser. (supposedly as long lived as a diesel engine... but wonder if it will get decent mpg as a six on a full size construction van... ) If I don't weigh the van down with a keep it simple conversion might be?
@squatlyfe those chevy vans are nice. though for vest milage on a gasser I think there is a combo of finding one with a shorter wheel base (think they call them the rally vans not sure) and you need the 7004r transmission with overdrive matched to probably the 5.0 v8 rather than the 5.7
no expert but i spent a good stretch searching for g20's and found that combo to claim up to 22mpg highway.
(seems to make sense... i think mpg is a dynamic combination and wheel base length, driving habits, and gear ratio/transmisson type all factor in)
http://en.wikipedia.org/wiki/Chevrolet_Van