Hi. I have an ongoing project with the installation of a Rover V8 and 5 speed manual gearbox into a 1955 Bristol 405. A while ago, I bought off the site what I thought was an Edelbrock 1404 carburettor. Turns out its an Edelbrock 14054. So a 600 cfm carburettor instead of a 500 cfm one. The guy doing the installation always said he would recommend a Holley 390. But I had a devil of a job finding a secondhand one. Reading the RPI Engineering website, they said they had stopped using Holley 390's some years ago in favour of the 1404. That's really why I looked for a secondhand 1404. I'm not really interested in big performance for this car. Much more interested in smoothness, and reasonable fuel consumption. The engine is a standard 3528 cc Rover V8. so I'm interested to take anyone's views. 600 cfm 1405 too big? 1404 better than 390? What would you recommend?