No, you don't. However, changing the pump can be a real PITA. You have to access it from below, car has to be safely raised and supported. Loosen the PS belt adjustment bolt, take the PS belt off of the pump pulley, push the PS pump as far outboard as it will go, tighten the adjuster bolt to hold it out of the way. The top fastener is a bolt the bottom is a nut on a stud. You may need to rotate the engine manually to get the fuel pump eccentric at it's lowest lift position to make it easier to get the pump in and seated, it will still have some resistance to seating. Get the top bolt well started before putting the nut on the bottom. You are now going to like this much but, it is doable. Let us know how it goes. Chuck
The pump arm is spring loaded so it returns after each pumping cycle. The pump arm rides on a round short cylinder, kind of like a really short water glass that has a hole drilled off center in the bottom. It is bolted to the front end of the camshaft so that as the cam rotates the "water glass" acts as a cam and moves the pump arm up and down causing the pumping action. Even at it's lowest lift point the pump arm will still have some pressure on it. The trick is to get the top bolt well started, and using the pump body for leverage, push the pump in far enough to get the bottom nut started. If you google fuel pump and cam eccentric you'll find pictures that illustrate what I've said.
