im going to be buying a 2003 GMC c2500 crew cab short bed but can't decide what motor to go with. My dad has the 8.1 and I liek driving that but I use the truck mainly for towing and some frodding through the desert and dunes. Just curious what you guys recomend for me. Im only 18 and need a truck that I will have for 6-10 years. I want to know what you guys knwo about fuel economy in either, weight difference, maintance intervals, general lieks and dislikes, etc. The truck will remain stock for the first year while I get piece together for a solid axle swap (dana 60) and 12 inch leafs with 40 inch ground hawgs. any comments appreciated! thanx again!!