A 30' box! LOL
We didn't spec the truck out we're driving, just driving what's available. However, if we were to spec this truck out, first thing would be a lower torque rear-end. Second would be an automatic transmission. Drop axel would be perfect for this truck, as would a liftgate. Though I don't know if I'd go with the liftgate for reasons such as the customer assuming they get use out of it for nothing. Last thing, a standup cab. It's a pain in the arse to be 6'4 and have to bend down to get into the sleeper.