I started lubricating the Z-bar bushing and basically anything else that spins moves or slides with synthetic disc brake grease, because it won't attack plastic or rubber and its one of the most complete greases with PTFE, Moly and teflon mixed into it's additive package. Amazing anti washout, heat and persistence qualities too.
Anyway, I had the fork fall off the throw out bearing a few years back and it left me stranded after a car show. Had to get towed home. It turned out that my pressure plate had failed at one of the 3 fingers, but they looked good when released. I had Mcleod rebuild the clutch and I installed the American Powertrain hydraulic clutch kit. My clutch has never worked so well in the 42 years I've had the car.
While you are under the car, take the time to ensure that all your linkage rods etc sit dead flat on the Z-bar pins and the opposite side of the rods do the same. In other words, make sure the joints in the entire mechanical clutch release system are square to each other. I had to bend and straighten some of the connection joints to get everything perfectly lined up in the past. It made a world of difference, but the hydraulic set-up is still superior.
