I'm 6 ft tall (about 215), and have a standard pan. There is no problem at all- if you have original speedster style seats. I had the old-style Vintage "cut down 914" seats on the first car and I sat high (enough that my sline of sight was pretty much the top of the windshield frame) and had problems getting the seat to go back far enough without hitting the door opening with the seat back. I've seen some guys with high-back seat that actually tilt inward to clear in this area- not super elegant. Anyhow the speedster style seats (JPS makes 'em to fit a pan type speedster) sit quite a bit lower, and while the base is wider than the old Vintage seats, the back clears the side of the car. It is MUCH more pleasant being inside the car, instead of on top of it. I have no idea how Vintage's new seats "sit", but the seats in my JPS were the suprise feature- I LOVE them.
I've got a short adapter hub for my Nardi wheel, and a bus-style turn signal for a more original look. This setup brings the wheel closer to the dash, which provides even more torso room, but limits knee room. I'm really comfortible in my car, you will be too.