Joined: Jan 2010
Posts: 9,834
Likes: 1,811
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
If they still shift well and transmit power uninterrupted, they could be ready for lots more service imo.
With a new chain, a badly-worn freewheel cog will skip under power, while a worn chainring usually only has a rumbling sound under hard pedaling with new chain.
Use caution while testing for the amount of pedaling force that this chainset can sustain with whatever chain you put with it.