We ran a 408 on the dyno today with a set of the Trick Flow heads. Engine had a Performer RPM intake, Holley Sniper setup and a 230/236 hyd roller cam. It made 450 hp and 490 torque. Not bad numbers for sweet street engine. It idled super smooth with a ton of vacuum and was a very quiet and smooth engine. Should make a great cruiser for the guy. This is the first set of these heads that I'd seen. They look like they'll make a bunch of power but this was a street engine rather than a race engine. Anybody else have some numbers to share yet?