The AMC pushrod is designed like everyother pushrod that is supposed to oil the rocker via a hollow pushrod. The lifter does not oil the cam.
Leakage at the lifters top and bottom of pushrod is a moot point or worry. Only an idoits hair to split into an argument for the sake to argue.
Comp Doesn't allways have "Chrysler" lifters. They often only have AMC lifters which are otherwise, exactly the same as a Chrysler lifter.