You'll have to try a one inch shortie on the port side and see if the engine picks up rpm and the boat picks up speed.
If that is true then you could put a 1/2 space on the shortie. If the boat picks up then you are set.
If your speed slows down, then ya got go get another one inch shortie and half inch spacer.
If none of the above is true your screwed unless going with an half inch spacer on the starboard side picks up your speed.
What really sucks is what you found. Your not the only one, my buddy bought a new 05 36 and he put half inch spacers on his drives he picked up speed. He is now going to try one inch spacers and see what happens. He may just go with 5 blades and no spacers.
good luck$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$