Do you think a 6'2" 250 pound guy would fit in those seats?
It's hard to say for sure or not. There is sufficient room between the steering wheel and my legs, but your alot taller than me. I would think that if a heaver person sat in the seat, that the springer base would compress more than if I was sitting in it. Which would equal more clearance room, but being a bigger guy would take up that clearance also. How much??? Next time that a friend is over that's about your size, I'll have them sit in it, and see how well they fit.
In the picture that I posted above, don't forget that I can take out the 3/4" spacers yet, for a little more clearance. And if you removed the slider assembly, and mounted the seat directly to the base, you could drop it probably another inch.