Of course I can't say much with a 100% confidence level that these components are original. But I can say that it is reasonable to make that deduction, based on:
1. Talking to the original owner, female, that did absolutely nothing on the car herself.
2. Having records of work done by auto repair shops
3. Items that would typically be upgraded first (radio, speaker(s), exhaust) were not
4. Original date coded carb, distributor, rear shocks (but not front), carpet. Original ball joints, radiator, drive-shaft u-joints, etc. Original trunk mat.
5. No evidence that the interior had ever been out before I did it. Zero wires cut.
Known items touched:
1. Rear axle replaced (but rear springs original)
2. Front shocks
3. Water pump and alternator
4. Thermactor system air pump and hoses removed
I'm certainly not stressed over the situation. I am secure in the decision to put it back the way I found it in 1979. But I am interested in the forensic speculation of how things like this may have occurred. I always learn something with the back and forth dialog.