the mach tank/ fuel pump is the same as the GT. replacement is VERY easy. if i were you i would upgrade to the SVT focus fuel pump (motorcraft) it will work fine and will allow for plenty of upgrades in the future. here's my fuel pump swap write up that was in my supercharger install guide:
the thread itself: https://www.allfordmustangs.com/forum...ps-advice.html
the section about the fuel pump install: "Fuel pump and the fuel filter were next.
-These were also pretty straight forward. Now that I think of it, nothing was really "difficult" it just took patience and time really.
-For the fuel pump you have to drop the fuel tank down. To do this remove the fuel lines attached to the tank itself. They are just held on by clamps. Two on the front and two on each side of the tank. Then remove the 3 bolts that are around the gas cap. From here go ahead and jack a jack up to support the tank while you unbolt the straps supporting the fuel tank. The tank might not want to drop right away because it a) might be stuck, b) might be stuck on the exhaust, or c) might be clinging on to this putty that for some reason is stuck to the tank and bottom of the car.
-Once everything is loose slowly lower the tank and make sure nothing is getting stuck.
-The top of my tank was a bit dirty and I was afraid of getting junk in the fuel tank so I vacuumed the top of the tank until it was clean. There are about 8 bolts holding the over on the top of the fuel tank. Unbolt them.
-The top of the fuel basket is held on by about 6 VERY VERY small screws. CAREFULLY unscrew them and make sure they do not fall in the tank. After this remove the top of the basket and take out the fuel pump.
-Repeat all of this in reverse order when putting the new fuel pump in.
-Once everything was bolted back up I went ahead and changed the fuel filter. This was a bit frustrating. MAKE SURE YOU WEAR SAFTEY GOGGLES!!!! Thankfully I did and fuel spilt all over my face but I ended up being alright. You can wash gas off of your skin but it can permanently damage your eyes. You need a special Ford fuel line puller that you can get at any auto
parts store. Mine was like 8 bucks."