Opinions on spreadbore carburetors

I have had tha carb. I also converted it to a 4150 as so to remove the secondary tuning plate for a more percise jet. Overall, it was just a fine carb for what I was using it for. I also did the same to the 600 cfm model. It also worked great, for what it was doing. On the engine/car combo in question, (mild build) there was zero performance difference.

What other OEM 4bbl. Holley carbs are out there?