Yeah, that's what I suspected. There was an older copy of some Chevy-specific publication on the book shelf at a semi-local speed shop that had an article on this stuff, but I never actually read it.

I would have expected the approach to have been putting the higher ratio rockers on the INBOARD runners, since what I've seen from flow bench testing bb Mopar intakes is that the longer & less restricted outboard runners typically flow better.

Questions raised by this graph:
a) Does the same thing apply to typical sb Chevy single-plane intakes?
b) Does this indicate that the increased dry flow of the outboard runner is offset by the additional wet flow frictional losses caused by the longer runner?
c) Am I freakin' lost in the theoretical clouds?