Keith, I think you're referring to IDAs.
Nope. See the above post…
I've seen manifolds that take the solex 40 P11 and weber IDFs, but the outer stud is in a different position. basically, these manifolds have 6 studs but depending on which carbs you mount you remove 2 of the outer studs.
I know about those, but presumably Dem doesn't have them…