What size carburetor should I be using LA 360 engine?

I never could figure out how Holley could rate the 670 SA's at 670 cfm when they have the same venuri and throttle bore sizes as a good ol 1850, which is rated at 600 cfm.

Either way, one of those should work fine for a stock 360, though I never liked the 670SA that's sitting on my shelf. Those things are tuned way lean from the factory and take quite a bit of tuning on anything more than a stock engine.