Kurt,
I am currently refurbishing a Bud Miles BBSB. I hunted with the boat using a 2 stroke 9.9 Johnson for years. Sorry for the pun but we are in the same boat; looking at different motors. I am going to purchase a Tohatsu 8 hp 4 stroke to add to the boat. I only weigh 191 lbs and when sometimes reaching to the back of the boat adjusting the engine the water would come over the feathered edge on the sides. I believe with the proper prop pitch and 8 will do the trick with no problems. The 8 hp Tohatsu weighs in at around 81 lbs compared to the older johnson at 78 lbs. I did run a 6 on the boat for a about 20 hunts in Northern Indiana. Had no problems pushing the boat where it needed to go but I do believe it was slightly under power at 6 when I crossed larger bodies of water...
Regards,
Kristan