CAB, i have found with both a 500 ci motor with 13.2 compression and a 588 ci motor with 14.8 compression the jetting here at almost sealevel like .116 jetting square.
seems the carb signals are virtually the same.
i think youll want to go .113 square and start from there.
also use 6847 metering rods and orange metering spring, put accelerator pump rod in top hole as well. hope this helps.