Help Identifying

core plugs aka freeze plugs-
where they dump the sand mold out of the casting
steel ones rust out if motor has been run with water only-
on each side and in the rear of the block

not to mention the aluminum water pump is
corroded
have the plugs out run a compression test
ck cap rotor wires etc
another check is to rotate the crank fwd and back and see if there is slop in the timing chain- you can watch the rotor