Hi Sandhu, I'd be leaving it as standard as I could. As discussed above, things to improve reliability seem a good plan. Like electronic ignition, low beam relays, modern alt, electric rad fan, etc. I'm also looking at ceramic coating the exhaust manifolds, to better protect the clutch and brake masters from heat soak, doesn't seem to be any downside here.
I also put rear seat belts in, as I do drive with the family, and will be updating the front belts also
Very envious, a brand new CSL, very special. Keep us posted as to how the restore progresses