If you wanted to go a cheaper route, you could always get the cast iron 6.0 or 5.3 truck motor and go with a LS2/3/7 intake.

I see you're from Ohio so my first thought (since they have a huge Ebay store) is: Schram Auto Parts - The Best in New and Used Parts

05 06 COBALT ENGINE 2.2L, 05 06 07 SILVERADO 1500 ENGINE 5.3L items in Schram Auto Parts store on eBay!

Edit: I don't see anything on their site now but keep your eyes out. They always get good stuff.