Side drafts
I'm always a proponent of efi, but I've long thought that using cv carbs from motorcycles wouldn't be too bad with a stick shift. You could use three pairs of ninja 500 carbs, or pilfer two sets of four from a great many bikes.
Or even 6-bank carbs from a cbx or Kawasaki 1300.
That said, side draft EFI would be possible with bike throttle bodies as well.