Major Update.
I purchased a 53k miles Vortec 5.3L w/Aluminum heads complete pullout including 4L60E, complete Wiring Harness, ECU, Exhaust Manifolds, transmission lines, all bolts, totally complete from the radiator, to the driveshaft, nothing cut, all unbolted pulled out of the same truck.
It will be delivered to me the middle of next week.
I couldnt be more pleased, I will post pictures when it arrives.