i am logging my duster also for afr. every first pass on my duster is a throw away pass cleaning the plugs.
it is real rich around 11.5 to 1 at my foot brake staging of around 2000rpms. when i pin it it takes it .7 to .8sec to go from 13.0 all the way to 10.8 then back up to 13.0 to 1 and i am blameing that on the accelerator pumps dumping. the intermeadit circuit has to be out of the picture when the throttle blades go past the notch to wide open. i got white pump cams for next time out to try and fix that. hell that is more than half of my 60ft that it is pig ritch at the spot it needs to be crisp to launch the car.