Give her a shot.
I do know that I just did a 427 SBF using a Dart block, AFR 205cc heads, a Super Victor intake, and a Comp street roller that made 564hp @ 6500. The cam had a lot more duration than the ones that they used.
Before you say that the TFS heads possibly flow better than the AFR 205's, the last set of TW-R heads that I had on a flow bench were down about 25 cfm from their advertised flow numbers.
A 50 hp difference is a chunk, especially when someone is running a nice solid roller and the other guy is running an antiquated Trick Flow/Crane hydraulic roller design.
As mentioned earlier, I'd love to try one of my engines on their dyno....or try one of theirs on the one that I use.
