this is a simple yes or no question. Can i put the heads and intake off a silverado SS on to my 04 5.3l engine.

 

Yes but you wouldn't like the way it runs. The 6.0L heads have a much larger chamber volume, you will loose a ~full point of compression, so unless your running big boost it wouldn't be a good idea. Better off porting the 5.3L heads and keeping your CR. The intake manifold is the same as far as I know.

 

Very true