I do know this is a hot rod forums but i wanted to ask some questions about the 6.2 turbo diesel. i have a 1982 chevy c30 with a 454 in it and would like a diesel with better fuel mileage. ive been looking at the 6.2 with a turbo. ive seen people say that they get 20-25 averaage then ive seen people say 9-15 average. i also want to know how much it would be to convert the truck to a diesel and not the 454. has anyone on here done that and how much did it cost you and how much do you get with fuel mileage. i want either Detroit Diesel or Cummins Engines ONLY! im also going to do nothing but haul all the time with it and use it on the farm. Thanks!