390 w/open chamber heads

I bought an RPM airgap as recommended, and yes I agree that the RPM should help more than the performer. My TCI adapter came in yesterday. I've been wondering...will the 390 require a bigger carburetor, I'm running and Edelbrock 600 on my 318. I want good, strong low end response and just remember....nothing over 5800 RPM.

Treblig