A few 383 re-assembly questions

Agree with the others concerning the cam, it may be bad as well depending on why and how the lifter failed.

As far as the valley pan goes, they are now sold with varying thickness paper gaskets to go on either side at the head. I had not seen them until 2012 when I started in on my mine. It solved the annoying little oil drippble into the top of the pan I was never able to stop in the day! Course I run a TM-6 intake.