My father's GC is leaking antifreeze from the bypass hose behind the water pump. It looks like the mechanic that previously replaced the water pump botched the bypass hose and glued it on with what looks like Indian Head gasket sealer.

Now that it's apart I'm wondering if I should just replace the bypass hose and water pump, or go all the way and replace everything I can get to while I have it apart such as all hoses, thermostat and housing? Radiator hoses are original, but look good.