I have a high panel in my 65 7ECA. Last October, my mechanic and I spent quite a lot of time behind it replacing the radio and other upgrades. With the removal of 4 or 5 plastic screws from the top of the glare shield (at least on mine), the entire top cover panel comes out and the instrument panel is only attached to the cross member above the knees. And of course, all the instruments and do-dads.
I would think that having a lower panel and glare shield to match would be very do-able.
The paperwork may be another question. It will also take some time moving and realigning all the instruments, gauges, radios, wires, tubes, etc.
I am 6'2", so the high panel is no problem for me.
Dale