The carburetor on the KX60's I saw were mikuni 26mm carbs like what come factory on the blaster except no TORS box (just a standard carb cap).
While they'll probably work, they won't be an upgrade.
If you're looking for an upgrade, go with a KX85 or a YZ85 carb. Certain year models had the keihin PWK28 carb on them.