Be a bit careful with those, particularly the crank. The pantograph engraving acted as stress raisers and they tended to crack under load after some use.

I expect the 6-speed freewheel never worked all that well even with it's OEM chain but we didn't know any better at the time. Modern index shifting with the accompanying shaped and enhanced cogs and chainrings is so good it has spoiled us and we forget how ragged shifting was in the past.