I had to look up the Glide Engineering seat frame. That's a pretty cool seat frame.
So you're looking for the dimensions from the top of the seat riser to the top of the seat, and the thickness of the seat back, correct? But you could do with a lot less thickness with that seat frame, giving you more room in the cab. But you probably want pretty close to original height, unless you're a low rider.
I can get those for you tomorrow.
