Both parts are pretty critical to proper operation of the engine.
A used part such as this is a risk, and both parts are relatively sensitive to rough or improper handling.
And, you won't know if they'll work until they are installed.
What's your backup plan if they don't work? Locate more used parts or buy new?
If buying more used parts, you're just tossing the dice again.
If buying new, well then you've just paid more than retail and had to do the work twice.
All things to consider.
Cheers!
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