Anyone with 3.73\'s and 33\'s.... My uncle is about to get another 12 bolt for his '72 Blazer with 3.73's. He wants to make sure that 33's and 3.73's is a good combo and still having good rpm's on the highway. It has a TH350 and small block 350 pretty much stock. Right now he has 3.08's and when he pulls his aluminum boat packed down with camping gear, it takes a bit to get going. Any input is appreciated. Oh and I did check the 'calculators' but they only figure for a tranny with overdrive, I dont know if the 3rd gear in a tranny with overdrive is the same as a TH350?