1999 chevrolet express 1500 replacing fuel pump/fuel level sending unit

Decided to drop the fuel tank and put new fuel pump/fuel sending unit.
Been having trouble with gas gauge for quite a while.
So I'm thinking this might take of both problems.:banghead:

I got the tank down about 4 inches, have it on a couple of jacks.
Having a little trouble disconnecting the fuel lines and electrical connectors.
There must be an easier technique than fingers?
As I keep dropping the tank will I run into any other problems?:banghead:
just don't want to break any fuel lines, wires, etc
any tips?

Thanks

Finished the job on sept on sept 2nd. thanks for the advice.

Here are some notes on the job:

1) I found out I did not need to disconnect the fuel line and electrical connectors at the top of the fuel pump.

2) Had to drop the gas tank slightly to disconnect the fuel tank filler hose to
siphon the fuel tank.

3) My most time consuming parts of the job were siphoning, trying to get the the electrical connector off the switch(found a wedge had to be
removed). I dropped the fuel tank and pulled the tank from under the
van and pulled the wedge out and The last thing, I spent a lot of time
on was the installation of pushing the fuel pump assy. into the gas tank.
I eventually put some vasaline on the large ring and used a small screw
driver and worked the assy. and ring together into the opening.

4) When the tank is the ground you can disconnect fuel line hoses and
electrical connectors from front of the tank.

Thanks again for the help.