Small block Chevy v-8 engines usually have 2 freeze plugs per side but early 400 blocks have 3 per side. Later 400 engines had two per side. All big block Chevy v-8 engines have 3 per side. NEW...
there are 8 freeze plugs on the water jacket and 6 oil freeze plugs however you will have to pull the engine to get to the back of the motor to replace the 3 oil and 2 of the water jacket plugs