The Delta flight looks to be arriving on time, assuming you're on PR895 you'll have 1 hour 10 minutes to get through, so it should be ok, and it looks like that departure is often delayed. There's probably by a fair bit of transfer traffic coming in from various SEA flights onto the late night departures to the US, but most should already have onward boarding passes. I seem to remember the transfer desks are pretty quiet at night, so as long as PAL is willing/able to give you a boarding pass you should be good.