Holley 1945 carb direct replacement for a slant six? Ideas?

Hi All: My apologies if this has been addressed before. I'm thinking about replacing the original Holley 1945 carb on my 1974 slant six. Has anyone ever found a direct replacement one barrel carb that works better than the Holley unit? It should bolt right up with the identical throttle, trans and fuel attachments. If you found one, how did you like the drivability compared to the Holley 1945? All ideas welcome. Slant Six Dan? Thanks!
I'm not sure if it's a direct bolt on but this is what I'm leaning towards as a replacement

Holley Sniper 1 bbl