As an added precaution I would fit an in-line fuel filter between your tank and new pump.
They are cheap enough and will protect the new pump from tank grunge!
I did this when fitting a new pump to my previoys car...a 4/4' a couple of years ago as my pump failed and I think it was due to grunge from the tank. I drained and flushed the tank as an extra precaution, finding some "bits" in the fuel I filtered and flushed with.
