Originally Posted by PowerPuncher
Marciano is disadvantaged by his era, in terms of sports nutrition, sports science, supplements, etc etc
Give him a world class nutritionist and sports scientist. Even give him appropriate steroids and lets be honest here 1 Klitschko has been caught cheating, its unlikely only 1 brother would be at it and boxing is the easiest sport to get away with using steroids. Holyfield has being highly implicated in steroids and it helped him go up to HW and revive his career after loses to Bowe/Moorer.
Then you have a 210lb, stronger, more dynamic Marciano that is an even playing field
Under those circumstances I'd probably go with Rocky, as long as he doesn't get too enamored with gaining power at the expense of stamina training.