dodge with the 6 speed manual all the way,wont leave you on the side of the road dead,Ive owned all three and that's all i do is haul {like 35000 pounds} the 7.3 r good running motors but the 6.0 suck put it this way in 36000 miles and only have owning it for 1 year it was in the shop 32 times ,some times for only 1 day and at the end like 3 months so if i remember right it was in for a total of 240 days so it went to the lemon law,but the Chevy's r good en less u r hauling alot of weight then you r going to have problems,all though the 03 dodges r as well but any other year of dodge is good especially the 5.9,so ya dodge in my book