[wkooiman]

That pic doesn't look like Holleys. That looks like the 2x4 intake that will only fit Edelbrock carburetors. I can't tell for sure with the air filter.

And you have many more options than that. The safest bet, in my opinion, is to get a high rise dual plane with a single 4-barrel Holley-style carburetor. It is easy to set up, and it will run well. You can do a double pumper or a vacuum secondary. I ran a 600 double pumper on my 302 in high school, and it was not too much. With a vacuum secondary, it is harder to over carb, since the secondaries only open if necessary.

The biggest visual impact is Webers, but they cost a lot more, and they take a lot of skill to set up properly. For what it's worth, I think this website has the best Weber advise on the Internet - short of an expert like Inglese.

Or, you could do a single 4 barrel with a Paxton supercharger. Or 3x2s.

It's your car, so you need to decide what you want. But remember, if you make it complicated, it will take longer to get it right.