Is it the ported vaccum switch?
https://www.mycarquesthomepage.com/a...tNumber=PVS112

 

No, no, no. It is NOT the water pump,nor the thermostat, or anything related to vacuum.It is right next to the thermostat housing.
Alright, follow a heater core hose. one goes into the water pump while the other one goes to the part, that is located on top of the intake manifold.it is for the heater core.
ahhh Why is it so complicated? I wish I could take a picture of it but I can't.

 

here is a pic i had. so i tried to circle it. you can't see it, but it's right there.
hope this helps.

 

I really need som help on this. Please

 

this is what you need http://store.summitracing.com/partde...5&autoview=sku

you could always take the old one to a place that sells hoses/fittings and match up the thread size.

 

Does it screw into your intake? Is it a elbow. If so your local auto parts store or hardware store should have that.
off topic: I like your valve covers.

 

You can get this piece off any carbed SBF. When I switched to carb I got mine off a 77 model V8 TBIRD