Y Blocks, 239, 272, 292 and 312 the engine ford built that would grind it's self to pieces because of poor oiling. The only engine that I can think of that had a fix for no rocker oiling.
A line from lower oil rifle to the valve covers to squirt oil on the rockers. You could hear one driving by just a squeaking down the road, pull the valve covers and metal dust along
with rust. Removed a oil pan from a 292 that had 7 distributor drive rods laying in the bottom. And that guaranteed to burn you exhaust crossover that caused all kinds of vapor
locks because the fuel line ran between it and the right head.