I remember going up to ring magazine as a youngster 15years old and looking at all of the hand molds of the Heavyweights, The one that stuck out was Primo Carnera, incredible and the largest by far, it was freaky.....Sonny had long arms for a guy slightly north of 6" even an 80 inch reach would be freaky but 84 is strictly myth
Primo was tall, long reach, big everything... sucked balls and got beat up and outboxed by much smaller men. Size ain't everything.