I made 463whp at 6400rpm with a novi2k on like a 92-93mix, it was still climbing but Walsh couldnt take anymore power out of it without it running like crap, and didnt wanna pull it higher due to already passing most's limits of the stock 4.6. I shift it at 7k and iam sure its making over 500 at that point its makes 8-9psi with the stock 9.85comp ratio and is bone stock from intake to pan with 133k.