Welcome to the FGRV forum family Dave. It sounds like you have a keeper there. Back around 1977 we test drove a Chinook
fiberglass pop-up motorhome that I believe was on a Toyota chassis, but I don't remember what motor was in it, but on flat ground in a head wind, 45mph was the best I could do. We bought a VW camper bus instead, then a couple of pop-up tent trailers pulled by VW diesel rabbits, then a couple 13' Scamps, then our
Lil Snoozy.
Happy Trails
Dave & Paula