Fuel pump replacement is really easy.  However, there are two kinds available and they're not interchangeable.  Over the years, who knows what's been installed in your car. The late pumps were installed on '74 and later bugs (referred to as alternator style pumps), and require 100mm pump drive rods.  The early pumps were installed on '61 to '73 cars and require 108mm pump drive rods.  Check drive rod length before ordering your pump, or order a drive rod to match it to be sure.  Of the "generator" style pumps, there are two fitting designs available:  One with fittings on the side, and the other with the outlet to the carb on top.