It's a (dirty) Mopar Rat, top to bottom, front to back, cross-ram

33IMP said
Technically, in mopar-speak, that is a long ram, not a crossram.

It is still a crossram, long or short, but you are right. Weren't some of these called "sono-ramic"

http://wildaboutcarsonline.com/memb...7_HR_Plymouth_Sonoramic_Ram_Manifolds_1-6.pdf