some guys said there is package better than LT4 !!

 

there are plenty of packages better than the LT4, but the LT4 is a great engine too. see my reply in your other post about another option. i am sure others will reply as well.

 

I like the Lt4 heads but in that GMPP package, your still getting stock LT4 heads and a hot cam. You can easily go to the following places and make more power than the GM package will for about the same price:

Thunder Racing - Talk to Steve Stumpf

LLyod Elliot has H.c packages

Advanced Induction - Talk to Phil

Futral Motor Sports

Horse Power Engineering - Talk to Chuck

All those guys can get atleast 400rwhp out of an LT1 six speed with LT1 heads.