Aw gee you all knew I'd bite.....
First off, welcome to the forum thats more dedicated to right hookers.....
To answer your question, they can be repaired/restored.
What you need is the FSM and the carbie overhaul kits.
This may be your biggest problem as a few people have reported them as being no longer available. Fuel Miser made a very good kit, search around you still might be able to find them, you will need 2 as a kit only overhauls 1.
Once overhauled and set up according to the FSM, your engine will once again run as it was manufactured.
Having said alll of that, may I suggest you don't bother, unless your restoring to original condition. This is the only reason why I'm still running Flat Tops as the 260 is origianal and I want to keep it that way.
Good luck..
Mike