Throwing parts at a problem is not the way to fix a car. You need to go back and triple check anything you did to the car when the vib started. If you don't know what you are doing, get someone that knows. You should not have need to extend the steering shaft, some shafts need an adapter, did yours? what did the instructions say to do.
BBK LT's, Catted Xpipe, Sniper tune, UDP's GT500 TB, Ford Racing CAI, CM delete, 4.10, TR6060, 1 piece DS