My F-350 DRW (same as the 450 now)

BIL 24-196284

That is was I just got to replace to factory stabilizer. If you don't have a stab already this is not the kit you need.

Best price and free shipping was AJUSA.com

And these are the shocks I just replaced (no lift)
http://www.ebay.com/itm/400390455710...84.m1439.l2649
http://www.ebay.com/itm/221178472779...84.m1439.l2649