Seriously and back on topic now.
Make sure you have a stock oil pan and not some high volume sump or something. After that the oil change advice is the way to go.

I have and could measure a '73 307 CI ... and the '84 350 CI in my truck


1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.