I’ve owned 3. 7.3’s over the years and still have a 99 F250 with a 7.3 it is licensed and still on the road. I also have a 2014 F350 with a 6.7 and the 7.3 doesn’t even come close to the 6.7 !! 7.3 was a great reliable diesel but there is a new sheriff in town now......the 6.7 ... better fuel, better power !! more comfort . I think it would take two 7.3s to make up one 6.7.