AMC lifter in an LA engine

Because Mopar push rods don't have oiling holes in them, the AMC lifters work fine. Any oil that comes up through the lifter just dead ends because the Mopar push rod blocks the flow. However, if you use push rods from a 396 Chevy application, that do have oil passages through them, in a 440, for instance, things will be somewhat different.
Don't ask how I know.