hop on over to LS1tech. You will find a ton of info there. If you have the money then your current build would be pretty nice. But alot of people go for a 5.3 motor and put on a turbo. Can make the numbers you are looking for plus the 5.3 blocks are cheap and easy to find. Glad to see someone else is MD getting a 4th gen!.
2002 Camaro SS- BTR Stage 3, 799 Heads, Bolt on's Tuned by John at Broadview Automotive.. 420hp and 400tq