I second a triple. Sugino makes fine triples and you can run them with shimano sealed BBs which will save you some serious coin over a phil wood BB. Triples can be tough to set up right on a bike with short chain stays (racing bikes) but this is a bike from 1969 so even if it's a racing bike it is likely to have more generous chain stays than a modern bike.
Alternatively get a wide compact (46/30) like this
Grand Cru Touring Hub 130mm
or this
IRD Defiant Wide Compact Road Double Crank Set (46-30T)
Sugino makes one as well
I'm a fan of roller bearing headsets. They last.
Headset Tange/IRD NeedL BlastR Roller Drive
The Retrogrouch: Roller "Needle" Bearing Headsets
Nitto makes great bars and stems.
I'm not sure what you mean by sealed hubs. Modern hubs are pretty well sealed. I'm a big fan of cartridge bearing hubs.
Suzue Ltd.
Grand Cru Touring Hub 130mm
For rims, TB 14 H Plus Son will look very sharp on an old bike.
Shimano bar ends with shimano derailleurs are hard to beat. Shimano is making it tougher to deal with triples though since the mtb stuff no longer works with road shifters. You'll have to source a 9 speed rear (which will work fine with a 10 speed set up).
Does the bike take long reach brakes? That would not surprise me since the frame is from 1969. This will limit your brake choices. Tektro makes long reach brakes. They are inexpensive and work very well. So does velo orange; paul center pulls will work as well. In fact, you probably have nutted long reach brakes in which case paul center pulls will look sharp and work well.
https://paulcomp.com/shop/components/racer-medium/