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.