71 Duster 318 fuel pump not pulling fuel from new gas tank

Mystery solved. Bottom line - I screwed up. When I removed the old tank last week I made tags and marked the gas and air vent lines. Unfortunately - I somehow got them reversed. I reversed the lines this afternoon and then the car started easily. I did a lot of huffing and puffing on lines before I figured it out and I got a good taste of gas in the process. :-( I blew on the gas line under the hood and fuel came out of the air vent line under the hood. That was quite a surprise but it made the problem clear.