If fold the backbox down and put the game up on end, does that give you the clearance you need?

To fold down a backbox, you will need to remove the two bolts on the inside that secure it.

Once you fold it down, be sure to put cardboard and a packing blanket down so it doesn't damage anything on the game.

After that, you can strap it or shrink wrap it to the cabinet body.

If you have a lift cart, then removing the legs is easy. If not, prop the rear side on a stool or sawhorse, take off the rear legs. Put a piece of cardboard down on the floor that is about the same size as the rear end of the game. This will help you slide the game around. Then lower the rear end to the floor, and tip it so it rests on the rear end. then take the front legs off. Then slide it where you need it to go, and then do the whole process in reverse order to set it back up again.

I've had to remove the backbox on all my games to get them through my stairways. Pinbot I had removed the backbox several times. Document and photograph all of your wiring harness and board attachments first. It helps if you can take the time to label all of the plugs with wire labels or even painters tape. Disconnect all wires and push them through the hole in the backbox floor, remember some harness plugs may be down in the cab, and you'll also need to remove the braided safety ground that attaches with a wing nut to the backbox floor. Next, remove the two bolts securing the backbox floor to the cab, and fold that down (place a towel down and SLOWLY fold the backbox down). Next, remove the four nuts holding the hinges on - two per hinge - and slide the backbox forward to clear the hinge. Attach the nuts loosely to the backbox bolts so you don't lose them. Reverse the whole process after moving the game.

To add to wayout440 on my PinBot, the head can be slid on the hinge pins (either To the left or right can't remember) so it full removal of the hinges may not be necessary. To do this it is best to have a helper to aid in the Back Box Removal.

And for god sake be careful you don't bump/break the topper in the process!!