Make sure and remove the broken pieces of the old valve seals from the top of the motor, including as far as removing the intake and valley pan
Years ago, back in the mid 1960s, I lost a oil pump on my 1957 Chrysler 300C due to the old OEM valve oil seals breaking apart in to small pieces from being brittle and part of one getting sucked up into the oil pump twisting the oil pump drive shaft off
I was in Utah visiting my Mother and Sister with my family in the middle of winter 800 miles from home so I had to pay a local shop to do the repairs
They did a good job at a reasonable price but a break down is never fun, no matter where and when
Preventive maintenance is way better than having to fix it after it is broken