Just to nitpick a little....
The bottom scoop is only indirectly related to fuel metering type...the real question is what induction type are you going to use...vertical or horizontal.
The scoop-less cowl is for horizontal-induction FI. The cowl with the scoop can be used with vertical induction FI or a carb. There are plenty of fuel-injected RV's running around out there with the scoop on the bottom.
So...moral of the story is you're right. if you're going carbeurated you definately need the scoop. Like I said...nitpicking. ;-)
- Jamie