I own a v6 2007 Chevy Silverado 1500 classic
single cab and i wanna swap the engine to a 6.0 v8
do I get a 2006 6.0 or a 2007 6.0?
The same year would be best, but remember your going to need all of the 6.0's electronics, wiring and the transmission to make it work right. Another thing that might throw you is the front suspension, it's setup for a lighter engine so some modding might be in your future. Be sure you check local safety and emission laws to make sure it will pass inspection if your area requires it.