Reply to "Long throw slave cylinder"

Thank you everyone for your prompt replies!! It means a lot!!!
I thought maybe I would add a little history for you to ponder. I do think the problem is that the clutch isn't disengaging properly. I bought the car knowing it was grinding into gear. The previous owner said it didn't do it until he put a new clutch and pressure plate in it and had the flywheel turned. When I drained the trans, several "teeth" from the block ring came out. I sent the trans off and had it rebuilt. At that time I ordered a new clutch, T.O. bearing and pressure plate from P.I. Also a new spring for the T.O. I have also replaced the "trunion bearing" and carefully adjusted the linkage to specs. I also found the mount for the trunion bearing was broken loose. I assume from when the engine was pulled by the previous owner. There were signs that it had been used as a leverage point. After all this I STILL grind into second, and after the car is warmed up, into 3rd, 4th and 5th. I drive it VERY carfully and am sure I have not done any damage -I just need it to stop grinding. It realle detracts from the fun of driving the car. I have tried bleeding the system and every time the fluid is very dark gray -something is wearing somewhere. I want to replace the master, slave and line and see if that solves my problem. Am I on the right track?