Welcome to the forum. Depending on what you really want to do. Are you looking old school or new/electronics package? A 383 is a very durable/tough/good torque engine, set it up with a carb, small cam, lots of bottom end, or go with a 5.7 full out electronics package from a Ram, but being a 1 ton, the ultimate in torque and low end power is a V10 (given the diesel is out). These V10s are tough, they are routinely getting 250,000 miles out of them with ease before anything happens.