You don't need 8" of lift to run 38's, just trim the fenders.
But if you are set on it, here is the best way to go so as not to have a stupid stiff lift.
Rear:
Diy4x - 1 ton shackle flip and switch with 6" shackles. (nets 4" of lift)
4" lift - 56" long Tuff Country rear springs.
Bilstein 5100 series shocks
Front:
Diy4x - B52 spring hangers, 6" shackle. (nets 4" of lift)
4" lift - 52" long Tough Country EZ rides (half ton springs)
Bilstein 5100 series shocks
SKY Off Road crossover steering for 8" lift.
Miscellaneous:
Extended brake lines (Skyjacker)
14 Bolt disc brake conversion (Diy4x)
Front extreme angle driveshaft (High Angle Driveline - talk to Jesse)
May need High angle rear driveshaft.
May need axle shims to help with pinion angle.
New gears front and back to accomodate new size rubber.
This will give you a better ride than stock, and give the lift you want.