flip kit and shackle= cnotch??

[ocbaud]

since my rearend is out, and i've got to take my leafsprings out, i thought i might wanna get some lowering shackles for the truck. would i have to run a cnotch to run these? right now i've got about 4.5" of clearance between the frame and axle and i have never once bottomed out. most big bumps and train tracks and stuff like that i take really slowly(especially with my new wheels, even though i've got 50 series tires)