The boots are not brittle, do I tie the airbox on to the carbs and put it all back as one piece? I have had several beers and poured several beers into the carbs to no avail.
FTFY. And stop messing about, cuss like a sailor, damn it!
Yes, encircle the carbs and the airbox together and gently ratchet them together. Use some lubey stuff just on the edges of the carb throats to assist in getting them to mate. Extra hands do help, but perhaps your cussing has driven off all the would-be helpers?