I am new to the site, I have done a lot of searching for the swap from 4.8 to 5.3 or 6.0. I would like to get some input on this. I have not purchased anything yet, want to be sure what I need first. Not sure wich way to go 5.3 or 6.0, or what year to purchase. I have a 2002 chev. Silverado 4.8ltre that the engine is about given up. I just recently replaced the trans (4l60E) about 2 months ago. any and all input would be greatly appreciated, thanks for all the help in advance.