You still test positive for hep c antibodies. Anyone who was ever exposed to Hep c or infected will test positive for hepatitis c antibodies for the rest of their life even if the test not detected for the virus. Because of this you cannot donate blood or blood products or sell plasma.
They will test your sample for hepatitis C antibodies as well as other blood borne illnesses. Once your sample tests positive it will be disposed of.
I assume there are questions in a form you must answer to donate. And I assume there could be financial penalties for intentionally making false statements.
Basically, don’t do it.