I'm 6'5" 225lbs. As long as you are under 240lbs, the weight thing is out. It is an ejection seat limit. Since the trainers have ejections seats, you'll need to start shedding the weight. As far as height. I am 77" the back seat of the 38 is barely bumping the helmet. If you are proportioned normally, I would think you'll be fine at 79" in the T-6 and certainly the T-1. Good luck.