Dead on 2 and 4

Check for coil bind on the valve springs.
Got plenty of clearance on that front, they are good to .575 and I am at .555 at the exhaust.

Thinking back a few years, I installed the pushrod incorrectly on that spring once, push rod was sitting on the lip of the lifter, I cranked it up and bent the push rod. Turns out I must have damaged that spring back then and it just took 3 years to complain about it.