318 block drain plug

Man trying to get brass freeze plugs even here
in SoCal is tough
Anyway, IC they list deep brass and shallow brass
which is used on the 318?
best


Either one will work...

Make sure to get the top lip of the cup plug just below the chamfer in the hole when you install them...

How to Rebuild a Small Block Part 3: Install Water Jacket and Oil Galley Plugs