You might consider this manual for the Johnson 14 loader, It shows it fitted to a QL Cub Cadet. Maybe some pictures in it showing mounting brackets to give you some ideas.
https://www.walmart.com/ip/Johnson-1...alog/755573634
I once had a Johnson FEL that came with a Sears Suburban lawn tractor. I sold it to a fellow that had a John Deere LT and included the necessary mods in the deal. It was a well made FEL but the Sears 5/8 front spindles were a bit light duty for it. That wouldn't be a problem, on say, an 1872 with 1" spindle and power steering. The QL's have 3/4" spindles but no OEM power steering, power steering is really a plus with a loader.