http://www.thunderracing.com/dynographs/?action=read&pgid=47Tom's_03SVT said:450RWHP with a 224/224 112LSA and stock ported heads is BS...
You need a 232 or bigger stick to make that power on stock ported heads.
Tom
The above dyno seems to be the one he is talking about - 443 rwhp/ 421.3 lb/ft with ported heads and 224/224-112 cam -- From the description, that is without a LS6 intake and it's going through a 12-bolt. With a LS6 intake it should be over 450rwhp.