poor dyno numbers from 408 :(

[red82gt]

The A/f from the dyno graph doesn't look too bad to me, the 17 is just when they started the run and wasn't at full throttle, the rest of the run is low 13 to high 13's which isn't too bad. It seems to rev smoothly up to just over 4000 and then things just aren't right. If the timing isn't advancing, that will be your first problem as the mixture is firing way too late, especially as the rpms go up. I think that is 99% of the problem, the A/F looks fine to me.