This '56 Sedan Delivery, "The Crusin' Missle", was built by our friend JC many years ago, featured in Hot Rod at one time. JC sold it to our friend "Polka" Jimmy probably 25 years ago. Powered by a 460 with a Holley 3 bbl. Jimmy still cruise's it quite a bit, still has the 3 bbl. Unfortunately Neither JC or Jimmy are on the forum or Internet to give us their opinion lol.
I have a couple Holley 3bbl's, tried one at the dragstrip many years ago on my 428 powered bracket car one test day when I was doing some carb testing, if I remember it edged out my 850 double pumper with just a touch more mph. This was in a 12 second car at the time, nothing too wild. I didn't try it on the street at the time, just didn't have time. I plan on possibly testing it again on the 427 tunnel port I have going together, if we use the single 4V intake.
One thing I'll note - my 3bbl carb still had the choke flap and I found that with the throttle open it would suck the choke plate closed, I had to tie it open with a zip tie to the air cleaner stud for my test. The choke plate on the 3bbl is controlled by a short cable on the carb, so it doesn't positively stay open by a "hard" link like a regular Holley. I wouldn't necessarily worry if a Holley 3 bbl you find is missing the choke, if you think your application will start fine without a choke anyway.