Ok, I am going to go with Super Swamper LTBs. I don't drive the Blazer everyday, mabe once or twice a week. Once or twice a month I do go on 80-100 miles trips to the mountains to go crawling. I have a 350 v8, 10 bolt rear & front with 3.08s and a TH700r4. I am also ordering a 4" rough country lift next week. Should I do 33x12.5 15 or 34x10.5 15?? I will be running these on stock 15x8 ralley wheels.