<VV> prepping old Koni's for use

[Ramon Rodriguez III]

I have a set of old Koni's I got on a car that probably have very few miles
on them but they are at least 25 years old.  Is there anything I can do
before installing them on my car to ease their transition from 20+ years of
sitting under a parked car to being used?

Also, any tips to identify stock springs from HD springs or other upgraded
springs?  I'm hoping there might be a set of better springs on the car that
had the Koni's.

Thanks,

Ray R.