sorry, couldn't find any exact numbers on google other than height, which is a bit above 6'6". the guy's wingspan seemed immense, even for someone of his height.
I do not think Savon was 6'6"! He looked more like 6'3" I recall Briggs looked a shade taller when the meet, though its hard to say for sure because Briggs hair makes him look a bit taller. I have read Savon's reach was 78". I suppose Savon's height can be found in the Olympic archives.
He was 6´5 tall, and weighed ca. 220 lbs at his best, against DaVarryl Williamson he looked definitely bigger, and Williamson himself is 6´4...
the vid of his bout with briggs is on youtube, and savon appeared to be a good amount taller than him - and much broader shouldered at that. 6'3" is way too short, i believe. maybe your thinking of teofilo stevenson? 78" reach? wow, i never would've guessed. if that's true then i guess it's probably due to the fact that AM heavyweights are significantly leaner than when they turn professional, giving them a longer look. but again, savon seemed much more wide-shouldered and long armed when compared to briggs, who has an 80" wingspan.