Well they upgraded them in 68 for a reason. It wasn't to save money. They were just a weak link in the steering that they themselves discovered. I remember when all the old cars were like that and as soon as you got that shake it was time for an idler arm. Its not they break constantly but they do have a problem of getting loose and if they fail your screwed. So why take the chance . If there was a replacement k-member for the early A's . The owners would be replacing them.
