Thanks, Jonathan! You take better pictures than I do, though.
Anyway, the bike, when level upright in riding position, has about 7 1/2" clearance between road and the back "drag nut" (see the last picture, back and bottom of the floorboard) of the floorboard. Leaning over, I can go much more than 45 degrees before the pedal touches, and I believe at that point, there wouldn't be any tire under me anymore anyway. One thing to note is that the floorboards stick out about 2 inches LESS than the stock pegs. This is not due to the mount, just the fact that the floorboards are about 2 inches more narrow than the pegs, if that makes sense. That's why there's so much clearance when leaning the bike over. I had planned to shave off the corners that fit inside the mounting bracket so that the pedal would fold up if hit, but I don't think it's necessary.