Truck is a 1977 K10, stock suspension, 3.08 gears, posi G80 rear, 4 speed manual transmission, NP205. 31" Duratracs. I use it about 50% city driving (I live in the city), 30% highway usually a 2 hour round trip, 20% farm type use. At the farm there's quite a bit of snow in the winter and some...