I have all 3 in running stock condition the 4.8 and 5.3 in daily drivers. the 6.0 on a enginge stand bc im slowly buying up parts to build it the way i want to build it. I plan on replacing the 4.8 in my 01 silverado single cab short bed with the 6.0 once im done building it. Meanwhile I'd like to play with the 4.8 a lil and maybe even the 5.3 just using bolt on/in parts i have. Witch is 3 complete motors the 4.8,5.3 & 6.0 i also have a drive by cable 92mm throttle body with the adapter to convert 3 bolt to 4 bolt and a cold air intake and dual electric fans. Between the 3 motors and what lil exta stuff i have. What combination with what motors can i get the best HP and torque gains from. Im mainly interested in playing around with parts from the 6.0 and the 4.8 but would consider using 5.3 also.