A few years ago I broke my left foot and couldn't drive the Hoopty in its pre-modified form. I'm 5'11" tall and didn't have any problem fitting into it.
It was October and very wet. I asked my 6'5" friend Mike (not really thinking, was I?) to drive the car from one place to another for me while I followed in my 928.
Dude couldn't fit. His knees were bowed out to both sides of the wheel, he had to reach under his right leg to shift, and his mellon was knuckled down as far and forward as much as possible to be able to see out the windshield.
It was ugly. His laughing words as he finally unbent himself from the car were, "Don't ever ask me for another favor like that again. I feel like Dino on The Flintstones."
Like John says, if Carey has a fix, it's probably lowering the pans -- but I'd make sure your legs will clear the wheel and allow you to shift.
Volkswagen had an ad about trying to stuff Wilt hamberlain into a Beetle. "They said it couldn't be done. It couldn't."
The tall guy on the right is the guy who wouldn't fit: