Its my opinion that both the sniper and fitech will function just fine with a dual plane. If someone believes it to be an issue, they can run a sealing plate, or a carb spacer to equalize the sides. Unless you're running a power adder, in which case there is science that a single performs better with forced induction, but that not an TBI issue, thats a boost issue.
That's good. I'll be purchasing one after Xmas. mainly for my 440 but i thought i might give it a try on my poly while i finish the dart but the poly is a dual plane, which is why i was asking.