What to do with new motor?

I used mostly water in mine during the camshft break in. I was warned that the Cometic head gaskets will sometimes leak untill they have had several heat/cool cycles. I figured water in the oil is bad enough without antifreeze if they leaked. Later I dropped the water and added the correct amount of antifreeze. The motor rad thermostats have a hole with a wiggler valve in it to allow air to escape while you are filling it.