I had the same problem myself. I wound up getting 350 blocks from ready-lift made for the camper special trucks. I believe it's the same block with just a longer u-bolt, but don't know that for a fact, as I havent visually compared them with normal F350 blocks. If you go that route, be advised it's a tapered block. I havent seen or felt any ill effects from it but just something to consider. Trevor @ PMF has some nice looking blocks; you might PM him for some info.
And yes, the F350 blocks will make your truck look right again. Mine measured out level with the 2.5" spacer but looked low in the rear. A 2" spacer would be the magic number for F250's.