The Marine intake for the Hemi was an inline, and I have only ever seen a couple.

Cathy Dornier(?) from Washington state had one on her 66 Dodge Hemi, and it ran well. The car was sponsored by some bank up there, and I believe her husband still owns it.

The difference is that it mounted two Holleys rather than two Carters, like the regular steet hemi did. A couple of year back, Chrysler offered an in-line, two Holley intake (they may still do), and although I have know way of knowing, I kind of think that it is based on the old Marine intake.