318 Cylinder Head Milling: Help the Confusion

I've been doing some research on milling 318 heads on various sites which means different opinions and the whole nine. I took some notes and wanted to see what I recorded is correct. I'm thinking about using the heads (4027593/4027163) that came off my motor since I already have them.

.020 (no milling needed intake side)
.030 (.020 intake side)
.040 (no milling for intake side mentioned / told to use .40 head gasket)
.050 (no milling mentioned for intake side)

My rotating assembly is stock. So that means my CR should be around 8.0 - 8.5:1.

Can somebody guide me to the light, please.