Offenhauser 4 barrel with what carb?

xlurkxdogx, Will you tell us more about your total package ? Things like transmission ? Gear ratio and tire size? A/C ? Timing ? Also road conditions and and road speeds. A high numerical (2.76) ratio is great on open roads for mileage. I dont think you have many hills or mountains in the Phoenix area but it all comes into play. You may want to go a little larger with your metering rods. If you go too large you will experence a surge at part throttle. Just a thought..