If I could figure out how to post the image of the A/F range, I'd do it. I may scan it later, but at the start of the run, from 2000 RPM to about 3250 my A/F is between 14.8 and 14.9. Then the rest of the way it drops from around 12.23-12.8. The guys at the dyno shop said this was a safe range to be in. Other peoples dyno charts show their starting #'s lower, but higher later on in the RPM range.

 

mine was erradic from 12.2 to 14.4 before tune, and is dead flat at 12.9 from 2750 to 6300 after the dyno tune.

the reason for the erradic behavior was puttin on a ginormous JLT intake and not telling the computer.

btw, a/f is usually much higher in the early rpms, then should level out somewhere between 12 and 13.x by the time the power band kicks in

 

regardless of rpm at wot your a/f should be somewhere between 12.5-13.0.

 

Jon's is even more ginormous...98mm without that venturi in.