Any Pontiac guys on here? Need insight.

Ply 67,
Had a fr brake hose on my GTO block up with rust/sediment before I bought the car. Driven 1000 miles like that......

Since the new lifters are the same type as the old ones, what do you think caused the old ones to fail to pump oil to the top end? Disc stuck to p'rod seat/gummed up?