[Mrturner1]

Originally Posted by leftybass209

Well, picking a carb isn't as simple as "i like Holley" and throwing it on there. The CFM rating can be directly related to the Hp/Tq that the engine is being designed to produce. In your case, you should either computer dyno, or guestimate the power your engine is going to provide.

Everyone has a preference, but the fact is they all work well. Some better than others in certain situations.

As far as the big three,

Tons of people use Quadrajets and have no issues with them. They get called Quadrajunk by people that don't know how to tune them, so they're pigeon-holed unfairly.

Edelbrocks are great carbs as well. They get slammed a lot because people mis-diagnose the heat soak/carb boiling/vapor lock issues and flood the carb by using too much fuel pressure. In reality, they're great carbs. They're also unfairly represented as the "fuel economy" carb and as such, people think they can't produce power, which is also wrong.

Holley carbs are great. Though, they are probably the most overused carb to fix issues with the other two. Edelbrock or Quad doesn't work? Many suggest, just throw a Holley on it, that'll cure your issue. Why? Holley carbs tend to work (albeit not well) in situations where the other carbs tell you something isn't right, and they don't know how to adjust the other carbs or diagnose their issues.

I've also seen dyno results on similar CFM carbs where the Holley was tuned to produce BETTER gas mileage than the Edelbrock. Of course that's the magical dyno, and not real world but it does indicate your level of tuning knowledge with all carbs is more advantageous than someones' opinion on which is considered junk, or better in one area than another.

I can't tell you your carb will be fine for your application, even with a jet change, because I don't know enough about the power output of your motor. I can tell you that hardly any street driven motor will struggle with 600 CFM at idle or around the town cruising. It's the full throttle demand that will cause lean conditions. You should assess how you plan to drive your truck and what you expect from your carb.

Man that is a lot of good info, thanks for the read. This website is full of so much knowledge its amazing.