I was around 205 when I went to boot. Boot was a piece of cake and I only gained 4 lbs. When I got hurt, I was about your son's weight at 6'3". My size and strength at that time was the reason I didn't croak when I got hurt, at least that's what the docs said.I hear you. My son was a 6'5" 280 lb. tackle (fb) and lock (rugby). His caloric intake was mind blowing.