WHy do you even bother?

The LS1 setups are ungodly expensive ($6-$8K) and for the money (hp/ $$$) ratio on a stock motor isnt worth it. Like it was said, the LS1 has an 10:1 compression ratio which would let you run more than 5-8 lbs of intercolled boost.... 3-4 of non intercooled. 3-4 might get you to 450 RWHP which is what a good heads and cam will get you for 1/3 the money.

Now if you built a low compression, forged setup, it wouldnt be bad, but there is still 2 problems... $$$$$$$$$$ and space.