[Hutch]

I have a set that is mismatched and was wondering which ones to replace with.
Is the stop the only difference or were ther other changes made?
What is the easiest way to identify one from the other?
If you could post some pics of both an early and late models and note the changes that would be helpful.
The only difference I can see is the steering stop but the front end rebuild kits have you specify either up to 70 or 70 and above.