I also got the got the Quarter Master "street" hydraulic bearing today. Remember how I said in a previous post that the clutch fingers are 3.25" away from the face of the bellhousing? We this is where that dimension is critical. The bearing has to be shimmed so that it is .100"-.150" from the clutch fingers. The shims go between the bearing retainer and the bearing and move it closer to the clutch fingers. I have mine set with a .090" gap. Tighter than what is recommended, but I am comfortable with it. The gap is needed because as the clutch wears, the spring fingers will move back towards the bearing. If there is no gap, the spring fingers will start to press against the bearing and there is the potential for clutch slippage due to decreased spring pressure.
Andrew