1971 La318 Starter issue?

Th eold mopar starter works fine some dont liek the sound. Truth be told if the car is running right you doont hear the windup toy effect as the car will fire right off on 1/2 turn. It sounds like "rernt whoom...." then the rumble.. if the car is goin "rerntdi di rernt didi rernrt didi..." a few times without firing off there is something wrong with the tune up.