Hey their chriller,
Welcome to the Forum. One of my best friends who does most of my custom metal fabrication and suspension work is right at 7.0 feet tall / 390 LBS, solid as a truck, and fits in mine. Yeah, they make em pretty big back in my hometown farming community. What he does is lay the seat back a bit and all is well. Probably not the greatest for room as far as passengers in the back seat are concerned by doing it that way, but definitely doable.
An if you would really like to work out the kinks in a system, I am willing to bet my friend Steve would be willing to custom fab a new set of brackets which could set the seat lower, and possibly go farther back if need be.
So one way of another we can figure out a way to make a PT to fit you anytime! Where there is a will, there is a way!
Go easy, and I hope to maybe see you around the Forums one of these days soon.
Candyman