Well, I have been trying to sell my LT1 so i can purchase an LS1 SS or T/A. This way I can go N/A with the LS1 and put down 430-470rwhp on the stock bottom and still pass emissions (OBD2 com port check ) However, i have been contemplating building a forged 383 LT1 and run 12-15psi (~600rwhp). It will cost about the same to keep my car and build the engine as it would to sell my car and buying an LS1. I dunno what to do. What do you guys think?