HELP! Clutch/ Shifter Vibrating Problem!

Hey What's up, I recently Replaced My stock clutch setup with a Centerforce Clutch, I also replaced my tranny (which was bad) with a Rebuilt T-5, I have a steeda triax shifter. Here is a list of the problems I have:

1 My shifter shakes in neutral, and vibrates when in gear. (More during high RPM's)

2 In the beginning it was easy to shift through all the gears..still is, but when I get on it a little it is hard to find 3rd.

3 Sometimes I cant get into reverse, (I do the usual 5th into reverse) I need to go back into neutral, clutch again, and I go right from 5th into reverse about 95% of the time.

4 My clutch seems to be engaging about 2inches (maybe a little more) off the floor.

5 It seems like I can hear a LITTLE bit of what seems to be metal shaking, not loose metal moving around.. like metal vibrating against metal.. I cant really explain it.. it is faint and only when im usually on an incline I can hear it if I put my ear close to the shifter.

6 seems like it isnt grabbing hard enough when I get on it, (which isnt much at all) almost as if it is slipping a bit... my stock clutch seemed to grab better.

I know my shifter cable needs to be adjusted, and i am going to do that soon, I just wanted to know if there is any input I can have like what else I can check for to see if that is the problem. My engine sometimes doesnt run very well so I sometimes get the whole car shaking, I would assume because of that the shaking is getting picked up through the tranny/shifter?, My Driveshaft may not be aligned correctly but i checked it when I put it in and it was fine, also my mounts are good.

Any input is appreciated,
Dave