what size carb ?

i got a 340 9.1, edelbrock rpm heads, crane 1.5 roller rockers, edelbrock torker intake, crane 470-270 cam. 727 w/2200 stall and 3.21 gears, i plan to run 750 holley vac. secandarys. is this a good choice? i have on hand a 750 edelbrock , and a 600 holley vac. secondarys. i have had the 750 eddy on before and it run fairly well, just want some other opinions. thanks.