"Full floater"- - - -the kind with the big center hub and axle shafts that don't carry the weight of the vehicle- - -like the HO 52 you're running now. "Semi-floater" rear axles have an axle flange that the wheel bolts onto and which also carries the weight of one corner of the vehicle on a single bearing. Either type can have eight lugs, but the full-floating axle with two bearings in the hub is more traditional.

"Cab and Chassis"- - - -a vehicle sold by a manufacturer with only a cab, front end, and a bare frame for aftermarket companies to equip with a cargo box or other dedicated commercial body. Some of them have the front section of a van installed with a big hole behind the driver and passenger seat area.

"Non locking differential" - - - -not a posi-traction.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!