A good carb will swap from engine to engine and work pretty well. (carbs are self adjusting - more airflow generates more fuel flow)

We use a Braswell 750 high flow on almost all of the dirt track motors that go on the engine dyno. That carb works on most anything between 600 to 800 hp and 90% of the time it works better than the customer's carb.

So if your carb was working fine and now it isn't, I'd suspect something happened to the carb or maybe the motor has an issue. Did you leave the carb sitting with Q-16 in it? That stuff is nasty.