Attention: TDR Forum Junkies 
Matt42, with wheels on and on the ground and the string draping down centering the nut on the center of the wheel hub cover = dead center of hub cover (at the time I had my 305s off and was using stock wheels with 285s so no big wheels) and adjusted track bar. I'd think this same process could be done, if you have big tires by setting string at top of tire tread, not allowing the nut to touch tire = just about ⅛" away and compare where each nut (left tire tread rib to right).
As for setting steering wheel, take tools to loosen drag link sleeve clamps with you and find a parking lot at a big box store, or even better behind the store where deliveries are made, you shouldn't have to drive more than 10-15' to see where steering wheel is clocked, then tweak sleeve until you get it squared. The steering box (gear) does have a center, which due to the fact that the splined shaft has one spline that is slightly larger than the others only permits line up one way or the two won't slide in, so once you have steering wheel centered the gear/box will be centered in the "driving straight" position. Of course due to extreme road crown in your area as your driving down the roadway the steering wheel will not be centered as it was when (once you get centered/square) you were in parking lot. Steering wheel going down the road, assuming road crown is to the right, will be as if you're slightly turning to the left as you are correcting counterclockwise to stay on the road.
Make sense?
As for setting steering wheel, take tools to loosen drag link sleeve clamps with you and find a parking lot at a big box store, or even better behind the store where deliveries are made, you shouldn't have to drive more than 10-15' to see where steering wheel is clocked, then tweak sleeve until you get it squared. The steering box (gear) does have a center, which due to the fact that the splined shaft has one spline that is slightly larger than the others only permits line up one way or the two won't slide in, so once you have steering wheel centered the gear/box will be centered in the "driving straight" position. Of course due to extreme road crown in your area as your driving down the roadway the steering wheel will not be centered as it was when (once you get centered/square) you were in parking lot. Steering wheel going down the road, assuming road crown is to the right, will be as if you're slightly turning to the left as you are correcting counterclockwise to stay on the road.
Make sense?
String, duct tape & a couple of nuts as plumb bobs. I'm still using the OEM tires, which ate LT 245/75 16. So the hub cover sticks out nicely. Thanks.
