It shakes hard when you dump the clutch. I don't shake much now just easing out but I think adding the 6 degree shims has taken some torque away from the wheels. It get hard shake at launch but not as often but very little tire spin. At 4 degrees it shakes more at hard launch but will spin the tires more. No shim, more shake, but get thru the shake at hard launch and it will spin tire as long as you stay in it.
