Just drop the tank and pull the fuel pump out and swap it. As long as you have been waiting I would do that anyway just for good measure. Plus he can clean the gas tank if it is dirty. It could be the gas tank is needs to be relined. Por 15 will reline your tank and it is not expensive. But your tank should be easy to drop and inspect. If it needs to be relined tell him to have a radiator shop just boil it out and then Por 15 it. That is someting I do on any older vehicle with a metal gas tank. If it is plastic you don't need to worry. But change the fuel pump and make sure the tank is clean. There is just not that much to the fuel system. I even replace flexible fuel lines just because they are cheap and easy to replace.
Thank ya thank ya, I will make this request to him when I bring him the air filter assembly!