I was replacing my water pump a few years ago, so I did the fuel pump at the same time as well as the fuel filter. So I had everything out of the way.
How Do You Replace a Faulty Mechanical Fuel Pump in Your Car?
Thats a writeup for generically replacing a mechanical fuel pump.
I did mine from the top, but I moved the alternator out of the way and since I was replacing the fuel filter, I could move some of the fuel lines out of the way.
BudW will tell you to use a wrench on the fuel pump fitting AND on the line nut.. do it that way. If you wrench on the pump but do not use a wrench on the line one or the other is going to go sideways and cause trouble (crimp, collapse, something). Then you take the part back down to the counter sales person and confess you need another one. They all chuckle and sell you another one and you just wasted another 47 minutes of your life and more cash.
Not too hard to do but remember to take off the battery lead so you don't cause other problems and I used gasket sealer like they recommend. Hand start the bolts so you don't cross thread them. Put a piece of cardboard under the work area of the engine bay so when you drop the bolt (not once but twice) you can find it easier and get it easier by just pulling the cardboard towards you instead of crawling on the floor trying to reach it under the car.
And pull your hair back in a ponytail or the ends hang down in your way.
JW