I have a 56 f100 with the stock 272 y block v8 and I am wanting to change the manifold to accomodate tripower using the holley 94's. I am a bit lost in regards to the right intake manifold i should use....most say to use the edelbrock 553 and few say to use the edelbrock 573 (which ive heard is mainly used for the 312). Here are my questions... Will both manifolds fit correctly? which is the best bet?

p.s. I do not have any engine work to it for now, but i do plan on slowly adding horsepower.