Electric Fuel Pump Install On A 1980 Chevy Silverado 250

Just recently, i dont know why but my fuel pump has stopped pumping gas to my carb. I put gas right in the carb and it fired right away but died, i checked the fuel lines to the carb and there ok. Just wondering if i should replace the pump or if its something else. I also noticed that theres a fuel line (from a tank i think) that goes to the fuel pump but isnt attached to anyhting its just hanging by the fuel line thats to the pump. If theres 2 tanks on the truck is there 2 fuel lines? Or what is the other one?

Pak0 Pak Pak1 Pak Downloader there. If anyone knows anything that could help me it would be great! Fuel pumps do just up and quit. I had one in my stock 1981 Jimmy 305 2bbl go out on me.
I was with my dad in the truck. He was able to change it in an vacant parking lot after we got some tools. I was 17 at the time.
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