sorry this isn't LT1 specific but.. would driving for about 2 - 3 hours with a doughnut be dangerous? why can't these skinny little things handle speed either? and feedback would be a great help thanks!

 

If it's on the front, you shouldn't have a problem. NEVER run a spare on the rear for any reason. It'll be total havoc on your differential.

 

The reason they can handle the speed is because of two things. First of all they can't handle the heat. And number two is that they can't handle the high rotational speeds. If you use them at high speeds it is more like likely to blow out on you or come off of the rim.