I found an old brocure from the 80's for Four Wheel Campers. In the brocure they list the Fleet as a model made to fit the "New" import trucks and the picture shows the fleet in a 4x4 Toyota pickup
KP, That's good news. The secret in the sauce is the set of measurements!!! Be sure of both the truck and camper.
To answere your question about jacks. There are tripod foot jacks that are placed at the center of balance. I think they may still be made, but have fallen out of favor and been surpassed by corner jacks. Check the Rieco site to see what is still offered.