I have been doing some reading trying to take notes on what the correct A/F range should be with a carb'd "street" motor.
I know that this will be a little different across the board, but this is what I have found so far (+ many revisions of this). If you have any additions or changes, please let me know.

12's: Right after cold startup
13's: during the warmup (before actual running temp)
13.8-14.5: N idle (actual running temp)
Hi 13's: in D with foot on brake (example: stop light)
??.?: Stop light to light accel?
14.5: Cruise
12.5-12.9: WOT

Thanks