I'll be building a new boat garage next month and am considering building in some strength to add an engine hoist in case I need to pull the motor. The basic structure will run 12 high by 12 wide by 32 long with a 1/12 slant to the roof. I was going to use exterior rated 2x4s as we see very little snow in the Seattle area. Has anyone played with hooking up a hoist to a barn or whatever to pull a motor? I was thinking about using 3 2x6's sistered together on the vertical and horizontal with the hoist in the middle for the weight bearing part. I'm guessing the 4.3L is about 600 lbs. Is the above about right to get the job done?