the age old question of wheel and tire combo's

[AspecialZ]

When I first started this build (76 stepper) I was going for the nostalgia look with the nice crager 15's or so, now after seeing some of your works of art I have feel into the larger wheel category, so heres my question, my truck is pretty much slammed, whats a nice size tire (backspace, width, etc) and rim combination, are 20's to much???? let's see pics, thoughts, anything you may have on the subject matter...I'm very interested to see what you all have done!!!