fuel recommendations

Just had my motor rebuilt: punched 440 10:5/1 Ross pistons, Comp cam K21-600-5 thumpr lift .486"/.473" , duration 279/296 200-5800 rpm. Getting pinging on light acceleration using Sunoco 93 so Im guessing the octane is too low. Have used Torco accelerator before ( 32oz in 10 gals of gas gets you from 93 to 103) Will try that first. Any other suggestions. Running pertronix distributor and vacuum advance on Edelbrock ( carter) 750 carb. Not sure what the timing is set at