I think some engineering is in order. Why not make the wheel removable and put an aircraft carrier on the front? Or switchable panels? Why not have one or the other pull down? heck, you could have the wheel flip up from a recessed position. It'll look goofy to a PP purist, but it'll work.
I like the "flip up" idea. I did a little tinkering and measuring and it looks like that would work.
I think I can fit a stack (from bottom to top) of a keyboard tray, then the steering wheel/gear shifter mechanism (flipped down flat), and then a control panel with joysticks/buttons, etc. The top panel would be removable and the wheel/gear shifter can flip up.
I think I'll mock something up and see if it will work the way I am thinking. I am absolutely thrilled about getting this Pole Position cabinet. I know a lot of people would not consider this cabinet "ideal" for a MAME conversion, but for me, it brings back a lot of memories. I put a lot of quarters in PP and PP2. The cabinet artwork is just awesome.
-Matt