here's what I am basing my opinion from. Originally I didn't ask the right questions here and bought some Boss 327's specs were 20x8.5et40 with Falken FK452 tires 255/35/20.. here are a few pics
notice how sunken in the wheels are.... not good.....
Now I have Work CR-KAI's in 18x10.5et23 with Nitto 555's 18/285/45
also angryginger, those pics aren't realistic view of how they will sit on the truck, remember you have to factor in "sag" of the suspension as you put the weight of the truck on the ground..
OP depending on what overall drop you want to go with will depend on what offsets will best suit you. Keep in mind with these trucks you can actually get more aggressive on the front than the back:biggrin: