clutch cable adjusting-no answer from search

As you can see in my sig., I have a Centerforce dual friction clutch in a world class (tremec) t-5. My throwout bearing is also from c-force and my fork is stock. I have an adj. cable, firewall adj., and quadrant all from UPR. This is my prob: I know I have to have a little play in my cable so that I don't burn up my throwout bearing. So, I adjust the cable at the fork so that I can wiggle the fork just a bit. I let the car back down, fire her up and clutch won't engage/won't go in gear. So, then, I move to my firewall adj. and adj. out until my clutch engagement feels right. I then get under car again to check play...NONE! From there, my efforts keep goin in the same circle and I can never seem to satisfy cable play and clutch engagement together. It's really aggravating and I would very much appreciate some advice. I gotta get her on the road. I started on this project April/June, and haven't been able to finish her yet because of college and a budget, but the cable adjustment is really slowing me down right now. Thanks!
-Clifton

Another ? Just trying to check the validity of your answers b/c I've been told by several people, locally, such as mustang owners, racecar drivers, the centerforce instructions, and my dad, who is not a mustang expert, but a pretty good mechanic...that I HAVE to have play (not a lot, just a tid bit of a nudge) so that the throwout bearing is not turning at all times. The t-out bearing can turn without the clutch engaging, which will burn it up...Do you have manuals and how long has your t-out bearing lasted w/o any tension. Thanks for your help.
-Clifton