03_leveledon37s

Have an 03 4wd silverado that has a 4.8 in it with 270,000 miles on it and it's time for a heart transplant. Picked up a complete 5.3 without a harness for $250 this morning. Planning on upping the performance on this thing a little. Thinking a mild cam and possibly 243 heads with ls6 intake. I'm a new member and this is my first personal build. Anyone who has this setup, some build pointers and help would be greatly appreciated!