Which Intake Manifold?

They both have small ports and thats the biggie. Offy is the only other one I know of that has small port manifolds brand new. Summit has them but some are special order. I have a Offy high rise equal flow single plane thats good from idle to 6500 they claim. I like it, it gave my 318 motor a smoother idle over that perfomer manifold and seems just fine down at low speeds and great after 4000 rpms. I do have 3.91's gears. All of Offy manifolds come in big ports for 340-360 and small ports for 273-318. They even still make the 1965 273 intake with the small 5/16 intake bolts