carb size for 512 stroker?

my experience with Hyd rollers in a big block mopar is there just fine long as you want to be all done by 5800. and yes i have run one. funny thing is everybody keeps telling me how great they work, i've yet to see any dyno pulls where they still make power over 6grand. by then the dyno numbers are all over the map because of the instability. what self respecting performance big mopar is done at 5800. and yes, the 750 is a little small for a 512.