The z-bar setup was fine originally. However, there are many components to this setup, and it CAN be a headache rounding up all of the correct parts. In addition, heavy-duty clutch and modified exhaust systems can pose problems with ill-fitting and bending components.
	Cable setups have gained popularity the last few years. They are a simple setup, not many parts, and smooth pedal action. You do, however, have to be concerned with clearance with many headers, as the cable often needs to occupy the same space. Most cable setups also include a firewall stiffener, as the thin sheetmetal was not originally designed to take this stress.
	In a hydraulic linkage system, such as the one we used from JMC, a small master cylinder connects to the clutch pedal, and mounts at the existing linkage hole in the firewall. A braided stainless steel hose runs to a small "slave" cylinder mounted to the transmission. The hydraulic forces cause the slave cylinder to move the clutch lever. Very smooth setup, with low pedal effort and absolutely ZERO header clearance concerns. However, clearance with some power brake boosters can be an issue. Hydraulic linkage can be purchased in "kit" form from JMC Motorsports for about $400. It's very complete, with no fabrication required. In addition, there are several online resources that outline the "make it myself" approach if you have the ability to weld and do some minor fabrication: Glen's 5.0 Hydraulic Clutch Page RTM's Hydraulic Clutch Page Deathman 68's VMF Post  Deathman 68's Parts List
	The hydraulic throwout bearing is similar in that it uses a small master cylinder & hose. However, instead of an external slave cylinder and clutch lever, the throwout bearing itself is a combination bearing and hydraulic cylinder, acting directly on the clutch pressure plate. Very slick, and self contained. You MUST do some accurate measuring from the clutch fingers to the transmission retainer BEFORE ordering, to insure you get the proper length.

NOTE: Make sure to match your linkage type with the appropriate pressure plate setup. Stock clutches are made to operate with the mechanical linkage which moves the throw out bearing much further. When a stock clutch is used with hydraulic or cable clutch, the clutch may not fully disengage. It's recommended to use a diaphragm type clutch with cable or hydraulic linkage.