We'll I hope it's big enough for a man of stature....I'm 6'9" Not skinny, but not to wide..about 280.

That was a concern of mine before I chopped the top, head room. I had it tacked together and I was sitting inside with boards stacked up, calculating the 4" channel and chop. Kinda came up with 3.5" chop for that reason also. I am planning on using the orginal seats and they pretty much sit on the floor.

I was actually sitting in there tonight with a couple boards stacked up. With the seat in the right position and decent angle to it...I seem to fit in there just fine.

Matt