Theres two 14bolts.
Full floater which is the original 10.5 ring, only came 8 lug. Thats the one ton rear but dont be confused but because these rears did come in 3/4 ton trucks before the semi floater came out.
The semi floating 14 bolt is a 9.5in ring, and replaced the full floater in 3/4 ton applications, so yes there are 2 different 14bolt rears.
The rear your friend is speaking of does exist. They were in commonly referred to as "Heavy half tons and LD 3/4 tons". These were in 88-98 trucks and can be commonly found in any 2500 you find that is 6 lug and any half ton that came with a diesel.
The semi floating 14 bolt is basically the same strength as a dana 60 with good axle shafts in it.