SB camper on a LB truck

It can be done I've seen it, but not sure why you would not want to put a long bed camper in. Long bed truck. I've also seen import truck campers on full size trucks, there are all sorts of combinations on the roads this time of year.
The price difference is one thing, but the extra room you will get with a long bed camper is well worth the extra expense in my opinion.
Soup