440 water pump housing question

[sgt72charger]

i have a 72 charger i built from the ground up
I am not using the heater core so i just used pipe thread plugs for the 2.
but there is still a pipe about 3 or 4 inches high on the housing to the left what is this for ?

also where the header is the font of the engine on the left side header there seems to be a hole where coolent is coming out of any ideas

[Windsor]

Can you put up pictures of  the components in question? 

[fy469rtse]

On the exhaust some of the studs go through to water jackets, you will have to put sealant on thread,
Water pump housing , just put another plug in , I used this for an additional temp sender

[sgt72charger]

thats what i figured with the water jacket.  I just put sealant on a bolt.
cant get any pics up sorry no camera

but i have two ports right next to each other that i thought were for the heater core then one ruffly 4" tall ruffly half inch wide just a few inches away that just sitting there

please keep in mind i built this car from scratch and left over parts so im trying to figure out the bugs

[fy469rtse]

Good job , I'm doing one as well from scratch, factory manual comes in handy at these times ,
Standing at front of vehicle, the two on the left are to heater core , your right , there's a spot for temp sender near water neck , one on the far right spare plug , probably from casting part from factory

[sgt72charger]

so tried capping it with a rubber grommet looks like it holds guess im going to buy an electric water pump or find another housing