4" lift kit questions

[brothers69c-10]

I originall was going to just do a 2", but have decide to opt for a larger 4" inch lift kit. I currently have 4" lift front springs, new u bolts front and rear, know where i can get rear blocks and i am putting the 56" long springs on my half ton as some of you probably remember from my last thread. I know for sure i still need to get a different pitman arm, longer brakelines, shocks, shock boots and hardware.

But.....

What about the sway bar, do i need lowering brakets for that or will it be ok

How about driveshafts, will they be ok in there stock length?

Dual or single steering stabilizer?

Alos where is the cheapest place to get the things i still need.

Thanks in advance.