New Probelms w/ New Clutch???????

[B2r3y]

I have just finished my King Cobra Clutch install on my 88GT and am happy that i got it done finally. well after bolting everything back up to the car i started it and took it for a test drive and these are the probelms i came up wtih:

-The first this i noticed was the tapping in the rear of the car witch could be my mufflers but not sure.

-Second, was the idleing. B4 the install i would idle around 750rpm's very smoothly, and now it lopes really bad between 600 & 900 rpm's and constantly does it and its noticable when im driveing also. I was thinking maybe it could be a vaccum or something that i had to disconnect when taking off the exaust (i noticed a tube running on the left side of the exaust witch i thought was a vaccum???) But i cannot think what this could be.

-Third was the smoking and smell of something from the exaust witch i could not think what it was but smells wied and smokes out the exaust.

-Last was when i was driving it and got up to over 55 the shifter would start to shake really bad in 5th gear and i have no diea what this could be either.

All of these problems i cannot pin point solutions too and i need some help on as many of these probelms that any of you could help me with.

Bryan