What kind of changes did you make to the carb at the dyno?
What kind of heads, valve size, and springs?
How much total ignition timing.
How much initial ignition timing.
What is the engine compression ratio?
241 rwhp at what rpm?
Tuning for peak power is much easier than tuning for good drive-ability and mpg.
That "RPM" cam may need a little more stall.