"Someone told me to forget the rebuild of edelbrock carb and get a holley avenger 570 cfm."

Is this someone a particularly knowledgeable guy?

I see a lot of recommendations to toss Brand X and install Brand Z.
Poor advice to say the least.

You can make either one of the major manufacturer's carbs run well.
Just takes a little study and a willingness to learn.

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Right now, I'd pull the metering rod covers - one screw each - and see if you have a metering rod hung up.
With the metering rods out you may want to pull the carb top and check float level & drop - spec's are in the Edelbrock manual.

Some guys are reporting that some Edelbrocks are coming through with incorrect float levels.
I have four fairly new Carter/Edelbrocks (same carb) and only one had the floats off and they weren't that far off.

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Go to the Edelbrock website, note the small print and you'll see a place you can click on that will download a manual in PDF format.
PDF is an Adobe deal and you can get Adobe free.
If you don't have it, you'll be prompted to get it.
Very worthwhile in a lot of areas.