Yes I did a 4.8. After installing a new cam, a litle head work, and some headers, It was putting out a little over 320 horse power. I used the mounting kit from johns cars, and headers, air filter, radiator from JTR. I went this way because you get just as much power out of the 4.8 as the LS1 for way cheaper, and it runs on regular unleaded instead of premium. And best of all, I get between 28 to 30 miles per gallon. Good Luck