higher speed problem

[Automan]

Hey guys:

Now that i have really gotten use to the car, i have been lately seeing how high i can get measuring off on the QTR mile (approx) using my speedometer. Didnt get very high. here is why.

As i hit 80 miles an hour, my steering wheel really started to vibrate.
At 90 miles an hour, the front end seemed to raise and it went loose. Meaning that i couldn't keep it straight. the steering was loose.

A couple of facts. I havnt gottin an alignment. did everything through measurments.
Before the london show, during a detailed cleaning of the chassis, i put the driver side front tire on the passengers and vise versa. There had been 3000 miles on the origional positioning.
I have had problems with my left side tire rubbing on bumps and on ramps. have tightened the coil overs on the driver side alot more then the right to countermeasure that problem.

So i looked under the dash. my flaming river column is mounted to the cowl mount bracket by a muffler clamp and a piece of rubber where the clamp touches the column. now there is space above the column so actually the column is just sitting on the clamp. The upper part of the column is probably touching the opening to the dash. Under the hood is the normal A&C setup with the muffler clamp and bracket along the footwell. That area is tight. i can move the steering wheel left to right.

With my front end, i was really thinking on replacing the front shocks because of the left rubbing problem before. Maybe the shocks are dead and thats why it lifted.

How did you guys mount your steering column under the dash to the cowl bar.

Any help, would be great.
Thanks
Automan