Howie
Check out my thread on floorboard extenders
http://www.cvoharley.com/smf/index.php?topic=7720.0Don't limit yourself to what HD sells
And again, you should have sat on my bike (seat and now floorboards and just for the heck of it WO 575's).
I have two inch extenders on the right side, world of difference. I do scrape that side a bit more, but the improvement in ride comfort is worth it. Although I haven't scraped since changing the suspension height.
Note, because of the kickstand on the left side it uses a different combination of extenders (mine came with a 3/4 version)
The link above has a link to the supplier for both the extensions and longer bolts required.
I used the stainless Allen screws.
I might still have the 1 1/2" version I'll have to look around.
And for those attempting to take these floorboard screws out.
My method is to use a 3/8" Allen wrench with the long side cut down to about the short side length.
I then use a 1/2" deep impact socket (3/8" drive) with a 12" extension as my wrench. There is very little room to work if you have an oil cooler as most of our bikes do.