After replacing the starter in Ole 71 6 times, might have found one that will do the job. Put 3 mini-starters in, one lasted about a tear, it's replacement and another brand lasted maybe 5 starts each! Put in a replacement Delco rebuilt starter, lasted 1 start and the gear drive one way clutch went Kaputt!
Got a replacement from Rock Auto, and so far it has gone through about 6 starts. Got to return the first one and cross my fingers this one lasts a long time. Each starter seemed to fail in a different manner so pretty sure the fault is just a bunch of cruddy starters!