Blocking Heater hose fitting on 24V V6

[Smity42]

Hi Guys,

I want to know if I can replace this fitting with a bung on a 24V V6:



It is the heating for the heater hose. I won't have a heater box, so I need to either bung up that hole, or run a hose from there to the bottom radiator hose. I would rather bung it up as it is neater and simpler, but I don't want to do it if it will prevent the cooling system from working properly (i.e. stop anything cooled by that gallery getting coolant flow past it).

What do you reckon?