HELP Advice needed

Hi Guy's

Ok my question is simple I am running a 750cfm vac sec Holley on Eddie Performer inlet I have had teh heads ported & polished got the right cam & everything runs fine best time of 12.91 @ 103.98 mph. My question is poeple at the strip keep telling me I should put a double pumper on & I will get better performance will this be the case or are they telling me stories.

Any advice will be greatly appreciated.

Thanks in advance Graham