I’ve followed your recent posts in regards to shaft oiling and difficulty finding suitable rockers. I think this is the thread will help you:
Magnum vs LA block...differences...preferences
I’ve personally seen 3 53020006 blocks(94-97) with drilled oiling holes. My spare block is a 99 and I haven’t pulled the heads yet, but I’m not too worried because it doesn’t seem difficult to oil them externally. I’m very tempted to pull it apart, but it’s going to sit for a while and I prefer to keep the elements out.