I use to shoot for .030 on the feeler gauge bewteen the clutch disc and pressure plate or flywheel on RACE DISCs, Most Mopars wth B&B clutches will work well with .060 to .125 between the throw out bearing and prsesure plate fingers. I put a new Center Force clutch set in my 1969 Dart GTS last year, I need to remove the over center spring now to get the clucth pedal to not stick 7/8 the way up from releasing.