What gears for 37\" tires ??? Okay, I know gears have been talked about for 33" tires and 35" tires. But I'm going 37x12.50x15 tires. I've decided on 37" tires. Here's what I've got. 76 K5 with a 400cid small block backed by a TH350/NP-203. Planning on swaping in a NP-205 in the near future. Will be adding heavy duty tranny cooler. I need to be able to drive on the interstate for cross country road trips, and go wheeling in the forest (Very steep hills) So what gears would I need ???? I plan on doing the swap and Detroit Locker in the 14 Bolt FF befor I install the 3/4 Ton axles.