16/42 is a good all around gear. It's what I run, I could use more but I street ride way more than track.
I got a couple of buddies your size and when they ride it they haven't had many issues. Never has come up alot with either of them on it. Have had it smoke the tire on the street.
Now on nitrous and me on it, it will come up a little but not on the motor.
Me - 6'2" 300lb
Bike - gen 1, lowered, 6 over, 16/42, small box mod, all short stacks, full pipe, running ecu editor, oh and a lil nitrous.