1989 360 Factory Roller lifter question

The two cams I did were in a magnum engines. I looked at a lifter from a premagnum engine just last week and they looked the same as the magnum. I didn't do a side by side to comparison, but I am very sure they are interchangeable. It even had the pushrod oil hole.

I did use the factory roller lifter retainer set-up (I assume you are talking lifter retainer, not valve retainer). The lift was approx .560 at the valve with 1.6 ratio rockers.

I built two engines for my circle track car using the hyd roller set-up and never had any camshaft or lifter issues. And these engines were run hard.