Original 4 bbl would be a Rochester 4GC.

 

In away did look like a Holley
https://www.google.com/imgres?imgurl...AgMQMwhcKDQwNA

 

Thinking back it was more likely a Carter WCFB......the Rochesters like the 4GC and the famous/infamous Quadrajet came later.

 

Curses to you db/sb. You stirred up my memory bank.
Years ago, I built a 455 Olds motor to put in my 72 Hurst optioned Cutlass. I went with a Carter AFB for the ease of it's adjustability. It sat on a Holley intake.