I currently have a rough country 2.5" leveling kit on 03 cummins with 35's. IM looking to get a 6-8" suspension lift kit and I'm leaning towards a 8" long arm kit from BDS. Anyone have some input on that lift or any input on what they have.ALso with an 8" kit what else will need modified like driveshaft, lines, any clearance problems? I have 17" eagle alloys with 5" back spacing and a positive offset will these work with 37-12.50's?

 

Yes wheels and tires will work with an 8".

Either BDS or Pure Performance. You can't go wrong.

Front shaft will need to be lengthened prolly 2".

 

What if I do a 6" lift? Will I have to modify drive shaft? I have been researching and looking on forums most agree with BDS as far as brand goes and long arm system for ride.

 

Some 6" kits yes, some no. Depends on the stock truck.....

 

I have a 4in BDS on my ford F350. Rides great!