race veterans plz help!!!!!!!

well my car is a 408 hydralic cam eddy head.motor 904 3500 convertor 3.91 gears..hooks perfect....

my car weighs 2900 with me in it.. this weekend we raced it it ran 13 flat...it has a holley street avenger carb 770....it would hesitate and bog as soon as u went wot and it just didnt run well at all...fyi i ran a 12.3 with stock small fuel system..changed to 3/8th and have a mechanical pump a good one tho..how do i improve my 2.6 60 foot..what can i do to the carb i have to make it better ..or what one should i buy any info would help plzplz input