I once had to replace the fuel filter on 351 Cleveland on my '73 Mustang Convertible. It was a pain... I didn't want to remove the power steering pump, and the fuel pump was on the outside of the engine block, right inside the PS pump. I could barely get a 1/2" wrench in between to turn the nut about 1/16th of a turn.... flip the wrench and make another 1/16th turn... repeat for 30 minutes while your hand cramps up. Only to repeat the process in reverse to tighten the nut on the new fuel pump.
But the new pump worked, so I guess it was worth it. A week later, the same symptoms appeared, and I thought, "Great... I got a bad fuel pump from China." So I ordered another fuel pump. But then waited a few months to swap it because I didn't want to go through the whole 1/16th of a turn routine again.
I finally got enough gumption, and crawled underneath to disconnect the fuel line that leads to the pump (gravity fed). I had a broken off golf tee ready to shove into the fuel line to cap it while I worked on the pump. I was surprised when no gas came out.
Turns out I had just run out of gas this time 
The car sat in my garage for 3 months and it was just out of gas.