I dunno if anyone has dyno results
for two short stacks but there are so many variables involved that somebody else's dyno print out wont be relevant to yourself. You would have to have identical bikes (clones) with the exact same mods, jetting, exhausts etc etc and be run on the same dyno back to back with same dyno tech on the same day. I hear what your saying about lost some mid and the top is the same, interesting way of looking at it.
There's only one true way to see if it's right for you and that's try it and see. I suggest starting with either two short or two long standard stacks and see what you think. Buy a set of standard stacks (cheap enough) and experiment. Don't forget this will upset the carb tune and will need adjusting to suit.
Here's a couple of threads regarding the airbox and breather.
Airbox modding
oil breather filter
(:-})
