Can anyone give me info on these?

IIRC, If you really need a cast 318 intake, the ports on both of those are going to be big for a 318 head. Some of the 318 guys would know better than I .
I agree with tha..t just would pick one up to have if and when I get a 360. Next trip back to Missouri I could get a good 360, no problem. The SB cast OEM spread bore intake (back there) were cheap as dirt and usually used as door stops, unless someone was restored a correct 340 car. Even then not expensive.
I just need to get in an old bone yard with some truck carbureted 360's.