It would be a good idea to change the timing chain guides-they are more critical. If a guide breaks it may bend valves. There are 2 often overlooked guides near the crankshaft inside the front cover also. Also the timing gears wear and change valve timing. They should always be replaced when changing the timing chain (the crankshaft gear also-it's just as critical) If you have no service history even more so.

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT