Spray everything down with PB Blaster or something similar, the screws nuts and bolts will likely be rusted thoroughly, expect that you might damage the small banjo fitting pipes connecting things together if things are very rusted, make sure you use a counterholding wrench as you try to break things free. Go gently and slowly on the electrical connections using plenty of PB Blaster to avoid breaking off a stud and needing a new pump or two in your haste! Get a couple pairs if smaller needle nose vicegrips cover their serrated jaws with duct tape of something similar, use those to clamp of the flexible hose from the tank and the other pair to clamp off the flexible hose connecting the pump/filter set to the hard line running under the car. Yes the tank will empty if you don't clamp it off. Release the fuel system pressure at the engine compartment before starting to disconnect things.

You will still have gas dripping from the pumps/filters so have a pan to catch it, try not to let it run down your arms into your armpits, it burns like hell there! Have a fire extiguisher at hand whenever you have open fuel around, put out your cigarettes, cigars, and spliffs before you start the project. Decent nitrile gloves are gas proof, latex, vinyl gloves are not.

You will need new copper crush washers to reassemble things make sure enough of them come with the new filters or you have some extras at hand, reusing old ones are a last resort and usually leak, but if you can't avoid using the old ones anneal them to make them soft by heating then to red hot with a propane torch or something simolar before reusing them, away from any open fuel of course.