Your engine build is similar to mine. Mine was dyno'd at 403 HP and built by IMM Engines in Indio. Where in L.A. are you? I'm in Downey.
I'm running an Edelbrock 650 AVS right now. It's not great, but it works and doesn't need much dicking around. Right now it's running a bit leaner than I'd like, but that's probably because it's freaking cold right now. Well, at least it's cold to us Angelino's. Like others have mentioned, a wideband O2 sensor will help tune your carb.
That being said, I have a Holley 750 that I want to put back on after I replace the rear fuel bowl. I always felt that with the Holley the engine started easier than the Edelbrock, but my rear fuel bowl leaked out the fuel inlet threads, so off it went.