2bbl to 4bbl conversion?

The reason I’m asking.....is if you look at my picture. I ran double 2 barrel Carter BBD carbs back to back. Both are the 285 cfm carbs.

Now I’m running a 600. I took them off due to a stripped fuel inlet that was leaking.

When I saw the conversion I was trying to figure out if I was running 800cfm progressive

Or 570cfm

I want to make sure I’m not over carbureted in cfm.
It did run fine before I took it off. I had it set at 60% for the primary and then the secondary kicked in....Was hard to tune but I did get it tuned...and the fact that I was working with a worn points distributor was a contributing factor I think....as well as other reasons.

I was also dealing with two master carbs. They were run identical with factory jets. The second carb wasn’t sealed at all....lol. It should have been a slave carb and was basically a vacuum leak. I don’t know how it even ran like that but it did and it ran ok. Kind of hard to start.

know a little bit more about timing and jetting now and want to fine tune them. Seal up the second carb a lot better and rejet them both. Total timed to 36° at 3k

Just making sure it isn’t too big....and belongs on something that flows more cfm like a built 360 instead of a stock or slightly built 318.

The 318 stock 1976 compression and will eventually have a 262 cam with ported heads and matching parts....streetmaster intake with headers and such

These carbs did run that engine for two years and they seemed ok but it doesn’t hurt to get second opinions.