65 dart 273, No fuel from pump to carb!

Do you have fuel getting to the pump? Is there any blockage, or kinks in the line from the tank to the pump?
It takes a while for an empty line to get fuel sucked all the way up to the engine, so don't expect immediate success.
On top of the carb, on each side of the air horn are rectangular-ish openings- these are your bowl vents. Using a squirt bottle, fill the float bowls through these vents. Then start your engine normally. Barring any restrictions in your fuel supply line, your fuel pump should have fuel before your fuel bowls run out of fuel. If it dies, fill them again. You should not have to do it a third time; if you do, you have restrictions or blockages in your supply line- kinks, dirt, bad rubber lines, blocked fuel pickup sock, etc. Time to get dirty and find out why you're not getting flow to the pump.