I've re-used the valve cover gaskets on my m117 so many times with no leaks - if I bought a new one each time I'd be broke.

Make sure to check the rails on BOTH sides of the engine. If they are deep-colored (darker than caramel), replace them.

__________________
Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k