....it depends on how you measure it too. Measured on a stationary dyno, we mapped down to 13:1 WOT and it felt prety good. I actually had it mapped 12.5:1 from 9K rpm up (for a small nitrous shot) and it picked up trap speed consistantly in the 1/4 mile WITHOUT the nitrous.
Ivan mentioned this in another thread, and I have to agree with him: the A/F line should be a slightly down sloping line (measured from left to right...) at WOT... starting in the neghborhood of 13.:1. :)
As for the rest of the map (sub WOT).... good luck with that. It's a pretty complicated affair that is better seen in person the first time (IE: find a good dyno tuner!).
Attack life... it's going to kill you anyway.