I don't think your bike needs all that. It's low miles and clean. The seatpost pin is in backwards, the nut should be driveside. I would replace the steel wheels with alloy if anything, and/or service the bearings. The grease is 45 years old and may have dried. The rear brake cable should be strait to straddle, it needs to rotate up.
More on the wheels, the steel when used in wet conditions does not brake well, yes the ribbed rims help but not significantly. If it doesn't rain where you are then it's not a big deal.