I run the Lunati that is one step hotter than the one already mentioned. Old part number 60303. .493/.513. 70 440 Cuda, power brakes, 4 speed.
I get 11inhg vacuum. Just enough for reliable brakes, but that’s all dependent on your idle rpm. Mine is at 750rpm.

With an automatic I would recommend at least a 2200rpm stall (which is still pretty tight, a lot of stock converters will easily stall this high behind a 440).

Power band goes to about 6200, high enough for me.