I got a good used complete 8.8 from a salvage yard. Had the flanges and rotors re-drilled to 5x5.5 (Thanks Jim!), new studs, rotors and brakes for about $300 total. Been driving it around for a couple weeks now in my 7 with an LS1/NV4500 and it is the strongest most solid feeling axle I've ever had in a vehicle.
What year CJ did you put your 8.8 in? Any pics?
'77 CJ-5 Renegade 304 / T-150, Dana 20, 30/20 axles, Aussie Locker in the Dana 30, American Racing 15x10 Outlaw II's, 33" Dynapro M/T's" ,Optima Battery, TeamRushed + Summit Racing CDI ignition, FlowKooler water pump, Edelbrock Performer Intake Manifold, Holley 4160 390cfm, Herculiner, Silver Ceramic Coated Hedman Hedders, Flowmaster 40's.
Warn PowerPlant HD 12K Winch, Dirtworx front and rear bumpers.