for a 9" wide wheel you are going to want to use at least a 235 and I personally wouldnt use anything thinner than a 245.

Since you are working on a truck, why dont you just adjust the fenders a little to give you more clearance? For that truck you can get 4x4 sheetmetal for the front which will give you an extra ~1". For the rear you are pretty much screwed but if you are hitting there then you need a different offset wheel.