Just another variation on great advice; I installed the carbs first with the throttle cables already attached. I then connected the 'choke' cable (pita) just before setting the carbs in to the mounts. Next I silicon oiled the lips of the boots, and folded the lip of each one, to get them set in the surge tank. After that, I 'set' the lip farther in to the tank by using a blunt flat pusher on the side of the lip while pushing up with my hand. I worked my way around through the limited access, but the method worked well for me. The tool I used was a screwdriver like tool with an exaggerated smooth blunt flat blade.
Good luck, patience is the best tool.
Good luck, patience is the best tool.