Edit

Can I use a set of 5.3L stage 1.5 heads on a lq9 or lq4 engine? It will have a small cam.

 

Checkout Kano's post in the sales section. He's got a set of WCCH 6.0 Stage 2's I'm sure are killer.

 

That didn't answer my question. Plus stage 2's are more than I'm looking for.

 

I don't know what I was thinking when I posted. HUA relay energized I guess.
It will depend on the size of the chamber. Stock 5.3s are at 61.14cc, whereas the 317s are 71-72cc. The LQ9 is already a 10:1 motor with the 71-72cc chamber, so any drop in cc will bump your CR even more.