oddballracing
+1y
I thought about this myself. I would look into sourcing a side-draft manifold from a Datsun/Nissan and either cutting off the flange part that bolts to the head and welding on a custom flange that was made off the KIA intake manifoild gasket or modifying the existing one so it would bolt to the KIA head. Then, if the source manifold was already set up for Weber side-draft carbs to bolt on, your in business. Otherwise you'd have to modify that end as well. All of the above could, of course, be crudely done in sheet metal, too.
You still need to do something about ignition, so you'll be putting some sort of trigger wheel on the crank or modifying the CAS to supply a signal to a MSD box or the like.
Trust me, getting everything under the hood from a donor Sportage sounds like a PITA, but it all goes together and would be much easier on you than making it carb'd!