What do you do with old intake valves? You could scrap them or, make yourself a set of carb work stands!
Just be sure that the stem size will fit your carb, in my case they are 5/16 and just fit the holes in this Edelbrock carb.
You could by locking collars to fit but I had some metal spacers so I drilled and tapped them for some 1/4-20 set screws. Just set them to any height you like and it keeps the carb raised up so it's not sitting on the throttle lever. A great way to work on a carb or to store one.
You may opt to trim them down in height if desired.
P.S. I am planning to take these to a power wire wheel to remove the old carbon but that's detail work...