As a test, I moved my stock alternator to the optional location, and it bolts up. I just need some bracketry, an
idler pulley w/spacer & bolt, a longer belt, some wiring, and another alternator. I don't know how critical the hose hanger is, but I'll probably make one.
***UPDATE***
After everything was installed & working, I found that the hose hook would be dangerously close to the output stud, so I decided NOT to install a metal one. I might add a plastic hanger strap later, but it doesn't seem necessary.