All for .370 lift and under ........

I'm well aware that I could put a 4bbl and all, but on this project we are working with the 318 2bbl components.
Which factory 2 bbl intake is better?
I have seen the single plane ones and dual plane ones.
Do you know why they had both?
I'm kinda doing the same thing as you are only with an A-Body just for fun...