On the subject of one spine v. two, in my case I am already running an 8 stack induction system. Two splines is insignificantly different rear vision wise. The induction is but not not a project killer.
Two spines clears the 5" tall velocity stacks with less trauma as they fit comfortably in between the spines.
My thought was that structurally two spines would be better then two. I personally have no way of measuring the load on the entire assembly at speed. It is better to be error on the side of too strong rather then too week. Rattling around would also be a concern. More places to secure the slats reduces the vibration by at least half.
The only thing that we "know" from wind tunnel testing results released to the public is that area over the deck is a dead air area.
Instinctively feeling I can anticipate designers thought processes, I can't dismiss the thought that at some point, even if it was just for an instant, louves must have been considered on the Pantera. After all, the Miura was already in existence and a powerful design statement that can't be ignored.
That was just a design "guess". As it turned out, the two spines worked well to support the clear Lexan cover over the stacks. That cover was a natural evolution in my case. To others that just want the look of the louvres, an irrelevant one to them.
As that evolved it worked out that the top most slat got left out from the louvre assembly. It was concealed by the roof spoiler, and the spoiler directs air down into the stacks, so my thinking on this is more then just cosmetic.
Removing that top slat unblocks the air flow from the roof spoiler to the induction stacks.
If this discussion is getting all too involved for some, then so be it but perhaps you should consider as many factors before getting involved in a project like this? The Pantera seems to be by nature a design that just others see potentials in that were never acted upon initially.