Habu,
Seeing your plane brought back some very old but pleasant memories...
My very first flight was in the right seat of a 1958 Skylane just like yours!
That first flight made such an impression, that I soon got a job at the local airport cutting grass and pumping avgas in exchange for flight lessons.
Two summers later I had my own ticket in my pocket, and a hugh smile on my face!
N2103G is still painted in it's original paint and colors (shades of tan and brown) in the same scheme as yours.
My friend still owns it, and has always kept it hangared, so it still looks great in the original paint and interior fabric.
Like you, all he has changed are things that have worn out, and parts of the panel. Although he has tried to keep it as original as possible, it is getting very hard to find original vacuum instruments, so he has been forced to "upgrade" upon occasion.
I don't know what avionics it came from the factory with, but when he bought it in the 'mid-60s it had a Narco "Omnigator Mk2" and a Mk 12 Nav/Com in the panel.
If I recall, around 1978 I followed him in another plane to a larger local field for it's annual, and while there he had the avionics replaced with newer dual Narco 720 channel Nav/Coms, a new omni head, an audio panel, and an altitude encoding transponder.
To me, there is nothing that looks quite as good as that fastback and square-tail design.
I'm sure you and your bird will be the cause for many envious glances when she is all decked out in her new/old finery.
Good Luck and Good Flying!
CptA