my bumper housed a 74 cable-type Bellevue and was later tweaked for a new 8274-50.
I'll drag it out this weekend (bottom of scrap pile) and pop a pic-two....driving to St Louis and back tonight, so ya may have to wait until Sat :D
I'll take pics of mine next week...remind me....
I have a 1974 warn upright and what appeared to be a factoryish plate behind the front bumper.
The ends are trimmed down, and it's not terribly straight...it's actually in the recycle/junk pile (well, but bumper is, the winch will works great!)