Carter Carb on a 273 HiPo?

I have a question in relation to the 273 HiPo 4bbl carb.

On doing some research I read that Carter made a replacement #9511S for the #4295S on the 273 and 318 engines with a 4bbl. It is a square bore and has an electric choke.

Has anyone used this replacement carb on a 273, and if so how is the performance?

Thank you.

KC