I did poly bushings and a 2" BL on my choptop, got both from Duff. Had to replace the bodymounts because it wouldn't pass inspection and had to cut all of the bolts out, seemed easier to just order a 2" BL and get the bolts, lol.
I didn't really notice any difference in ride quality either.
I did, however, add extra washers to the BL kit. I put flat washers top and bottom on all of the bolts and a lock washer plus locktite. Perhaps a bit of overkill... I'll see about grabbing a pic if I remember.
Oh, yea, the hardest bolts to do were the ones in the back. I've heard a lot of people say you have to drop the gas tank to do them. I found that I could worm my hand in there and get it together, then cut down a deep well to make a shorty deep socket and tightened it up.