I'd thought I'd throw this on here in case somebody needs them. This is on Xrunner Drifters truck and we did this the same time while installing a new flywheel/clutch and headers so the trans was dropped we followed this thread http://www.xr-underground.com/vb3/showthread.php?t=20459. It's pretty simple to install. One of the key things about it while looking at the old TOB is that it was packed with clutch dust and had a bit of corrosion. With the URD TOB you have the bearing but also a steel sleeve and grease. You slide it on the input shaft, when I was installing it I found it helpful to turn it in a slight clockwise fashion. Doing it this way I almost had it snug to where it was almost touching the bell housing. This is where the lip (boxed in red) will come in handy. All you need to do is tap it with a chisel, it won't require much force, but slowly tap it in a 360 degree fashion to insure that it sits evenly. DO NOT TAP IT ANYWHERE ELSE OTHER THAN THE LIP. The kit also comes with two screws and a alan key and these go onto the lip as well. Now you can install the TOB but remember to grease it. I didn't drive the truck but Xrunner Drifter reports that its good, no more annoying noise.