Damn..I forget which but look at it and you should figure it out, pull the helmet, put the driveshaft bellow on one side and the exhaust on the other, it makes getting to the clamps easier. For the hose, get the REAL merc hose. the ebay ones arent worth a damn, not stiff enough and crimp on you. While your in their on an Alpha 1 do the shift cable.. good preventitive maint as they start getting sticky causing stalling when you shift docking. Instead of trying to tighten them with a screw driver, use a 1/4 socket with a universal and long extenson and a cordless.
Thinkng about the order, I think it was easer to mount the exhaust on the gimble and the shaft on the helmet then put it together. Use some long siptes to hold the helmet up somewhat in postion but loose enough that you can wobble it around.
Same goes for the ebay bellows. I had one that only lasted one season before it came apart bad. cought the boat going down at the dock, water was just under the dipstick.