I have had a edelbrock 600 cfm on a edelbrock airgap on my vortec 350 bored 30 over or 355 for a couple of years. I am happy with it. For the dollar it is an excellent setup. There might be better setups but the cost will be much more.
Some people hate the edelbrock or carter carb. Mine had been trouble free. It certainly is the least expensive carb out there.