Upon getting her home I start with the usual inspection, The guitar itself is in almost perfect condition and sounds fantastic, the only minor faults are the bridge, as the previous owner had tried to slot the bridge and the radius is off making the high e is a little too deep also the D & G tuners are a bit sloppy.
Swaps to do =
Upgrade wiring and pots (I do this to virtually all my guitars)
K40n-2a Paper in oil capacitors
Nickel Wraparound Tailpiece (I want it to age naturaly)
Nickel Machineheads with vintage style cream buttons (same as above)
I may change the pickups as they are a little confusing, they should be wilkinson stacked ceramic P90's however they sound smoother than ceramic and the readings are closer to the wilkinson Alnico V p90's(no way to tell as no markings on on bak and previous owner had coloured in the wilkinson logo), either way they sound fantasic - very similar to the one in my 2012 Gibbo 50's tribute SG
Vintage do make a good guitar for the money but for free makes it a great buy, especially as you have the skills to tweak it more to your taste.
I've had a few Vintage electrics over the years and the standard, if properly set up, was way higher than the prices suggested.
All sensible upgrades on your list - you should hopefully get a keeper from doing that.