An interesting question!!!
I believe the problem area would be that the early cable pull carbs have an individual throttle stop screw, whereas the later linkage carbs have a single idle adjuster screw on the lifting bar set up.
I suspect that the later carbs would still have the casting for the throttle stop screw, so it may be possible to drill and tap that out, and then to carry out the conversion you have suggested.
Let us know how it works out!
Cheers - Chris