HvyChevyZ71

After doing some more searching, it seems that the ony cheap mod left is underdrive pulleys which i might do but im starting to become interested in a cam. How much gains would i see with a mild torquey cam, any recomendations on which one? How about a vinci 080? I will put new springs in if needed. Will I gain low end torque but also see power gains through the rpm band? Im not sure I want a stall since I occasionally tow with the truck, but it would be nice to roast the 315's off a roll.