QUOTE(orange914 @ Oct 23 2008, 01:53 AM)
will the 73' struts plug into 72 balljoints. basically frankinstiening the 2 assemblies together?
it's been done. you couldn't recommend it, but it's been known to happen.
Short version - you -can- file a 'V' shape into the early (pinchbolt) ball joints and use the wedge pin to hold it all into shape.
This wasn't a good idea 30 years ago but sometimes we do what we have to. These days it's a really bad idea... Because: an early ball joint is probably worn out. If it's -not- worn out (say you got one of the last NOS ones...) someone can probably use it - send it to a good new home.
The early ball joints are NLA - but the '72+ are still available. You need a new balljoint, just go buy a new ball joint.
As to your question - '72 was a transitional year (for sure in 911-land, less sure about the cutover with 914's) so before ASSUMING what you've got, you really need to go look to see if you have early or late struts/joints.
What I've seen in the early struts is that for a variety of reasons, the hole at the bottom of the strut wears and won't safely grip a ball joint shaft. Once upon a time I thought there oughtta be a way to fit a sleeve so you wouldn't have to pitch an otherwise perfectly good strut, but fast-forward 30 years and now I think uprating to the new stuff is probably the right thing to do unless you're competing in National-class concours.