I would've thought that Trick Flow would've had the head flowing better until .600 lift or so since to me it's more a performance head. Most guys that build an engine use a fairly decent size cam in their engines, I'm not saying it needs to be a .700-.800 lift, but .600 is pretty common anymore.
According to Trick Flow's published numbers, it does flow good up to .600 lift however others have found this to not be consistent with what they see on their bench.
