273 carb probs!!!

I would not go by those charts. It is a good rule of thumb, but I've run a 750 CFM thermoquad on a 273 and it took every bit of it.

As for the original queston, The 600 seems to have a problem. I would take the top off and set the float level and drop. Check for contamination while you are in there. then adjust the choke till it closes when cold and is wide open when it reaches operating temperature.

Summit 6900 Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 262/272, Lift .420/.442, Chrysler, Small Block

I tried most carbs on a 273 and my least favorite was a Holley 1850. It was OK when it was tuned, but I always seemed to have to mess with it. Any carb with an adjustable air valve for the secondaries is a plus on the smaller engines. TQ, QJ, AVS