More Magnum Block Oiling Questions

1) I've read that some early 5.9 magnum blocks have oil holes for shaft oiling through the head (even though they're not used). What year blocks still have this provision?

2) Do performance replacement magnum roller cams have oiling holes drilled in the appropriate journals to allow for through-head oiling?

3) Do cam bearings for LA 360s work in a 5.9 mag block?

Thanks!