Bad Idea
I believe the 01's w/6spd have a clutch that doesn't hold up well to extra hp or abuse and sled pulling would be the abuse needed to mess up your clutch, or you may get lucky? and not slip the heck out of the clutch. If you are going to pulling I would think you could start in 2nd low with out sliping the clutch and 3rd low with some slippage to get moving, for your first pull then move up gears if you feel the need or as you get comfortable with how things go. Most sled pulls require a BIG clevis with 3. 5 inch inside diameter. This advice (take it for what it's worth) is what I have learn from 3 pulls. Most important HAVE FUN !!
Craig