Clutch Slave Cylinder with Adjustable Rod 240Z 510Clutch slave cylinder with adjustable rod for Datsun 240Z, 260Z, 280Z, 280ZX and 510 1968 83. The adjustable rod originally was just on the early 70 72 cars but we find it works out great for taking up any slack in the system on all years. Also available without any rod. *For the adjustable rod to function you will need a clutch fork with a hole in it where the rod contacts it, or you can drill a hole in your existing clutch fork.