A friend from work has a standard cab chevy with a 350 and a jet t700 trans. The truck has a spindle lift and 33's. Right now he is running the stock gears 3.42 i think, and factory locker but wants to upgrade. The question is what gear ratio would be best, should he keep the same locker, where should he get the gears from and around what would the cost be? He has someone to install it, just needs the parts. Any info would be much appreciated. Thanks.