750 Holley vs avs2 650 cfm carb for 340?

DentalDart said
I originally had an Edelbrock 1405 on the car. Compared to that carb this one is night and day.

Compared to the Holley 750 I would not be able to say which is better. Unless someone has used both it's hard to make that comparison I would imagine; no? This is why I only stated that for my application it's been amazing.

I read that holleys were good, but a little harder to tune than the Edelbrock which is why I went with the AVS2, plus I already was set up for Edelbrock with my Lokar kickdown, and it fits under the hood with my RPM air gap and Edelbrock air filter.

Old vs new in pictures.

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I'm not discounting your experience. I was pointing out your limited data because of limited testing.

Mattx gave you the very best advice you'll ever get. Learn to tune what you have. You'll get way more out of it that way than swapping parts.

All carbs, regardless of the name on it, operate on the same science and physics. Once you get a fundamental understanding of that, you can essentially tune any carb. Here's a little fact most people don't know. Every single carb out there is a 100 MPG carb. All of them. Think on that for a minute.

As for tuning ease, the Holley is far and away easier to tune. It's not really even close. And that's not a knock on the Carter/edelbrock stuff. It's just the truth.

The other thing is the Holley has way more tuning options than any other carb out there. Options that are easy and cheap to do. The quadrajet may be the most tune-able carb out there, but it is also the most technical to do, and the least easy to change if you get jacked up on tuning.

Part of the reason Holley gets a bad reputation is that Holley as a company has propagated tuning mistakes and ignorance for decades. And they STILL do it. And they wonder why there are so many carbs out there with screwy tuning on them.

That was my point and I really didn't want to type that much. But it needs to be said. If you study the principles of carburation, it applies to all carbs. If you then take that knowledge and apply it to any carb, you can tune it.