Sonny Liston had to have gloves made for him ...he could whack a bit & believe it or not Barry McGuigan also had big hands & longish arms for a featherweight. Tysons power came from his thighs, he could decapitate a rhino if he could get close & uppercut them ... As far as shoulders go it can slow you down..I have wide shoulders & deep front to back...but I suffer (as I am now) with broken ligaments in my hands...& elbows that get really sore, so better a pop & move guy for longevity ...Floyd knew !
How about narrow hips? The smaller the hips the faster the body can rotate the upper body during a hook.
Why, oh why did I EVER leave this forum? You can't get entertainment like this anywhere else on the internet. Glad I'm back!