6'3" 175lbs luckily narrow is not my issue lol! I am all legs, seat max back and down, and i have driven CO to OR 3x in it non stop. yes it is a lil crammed, my biggest issue is getting my legs in/out of the rather narrow door frame haha. get the Box, you will have so much fun driving you wont notice how your sitting!
your biggest problem isnt height, its that ugly Avatar you have