I just got a Trane XE80 downflow furnace/ AC unit out of a neighborhood house that's going to be demolished next week. The unit has a build date of 1995. As I said it's a downflow, can it be reconfigured to an upflow ? The furnace looks to be in excellent condition and was used until the home was vacated last year. If it can, I'll use it to replace the 1980 Carrier in the house and put the Carrier in the garage.