water pump hoses to heater core......help please

[MaNdEr]

I have a 1967 Chevrolet short bed 2wd with a 1979 Chevy 350 small block and I am getting rid of the heater all together (less weight) and it has 2 hoses coming from the heater core one connects to the intake manifold and the other goes to the top of the water pump. question is can I just plug those two holes or do I need to run a line from the water pump to the intake manifold? I cannot tell if the water pump accesses the block in any other way.. I know the bottom raidiator hose connects to it but idk about just pluggin those holes... any comments will help as this is my first project/build.