I think it will have to be taller (just the diameter of the tube) unless you lower the seats in the jeep - which would make it harder to work the pedals. I'm 6'1 and my head is almost even with the windshield frame on mine IIRC.
This is one of the nicest Willys cages I have seen.
(Not done here)
This picture kinda shows it with his top on... all the other pictures look like it is level with the frame.