Trucks are a bit heavy so don't overdo it on the cam, I have previously used a comp cam, Extreme part #12-246-3 with an Edelbrock airgap intake, which should work alright with your valve size, also a torque converter(heavy truck again) with a 2500 stall speed and a half decent gear ratio if 3spd auto 3.50 to 3.73 ratio and 3.73 to 4.10 if 4spd auto. Run a cooler on your trans always a good idea. Not the best heads though a set of vortec would be a better choice and cost effective. Oh 650 dbl pump Holley or 750 Edelbrock carb will work good on a truck. Let us know how it turns out.