If I remember correctly(and i'm getting kind of old) Cope wants 15 springs in the clutch pack, 2 servo springs and a 4.2 lever. All three of these along with clutch pack clearance and band adjustment affect the timing of releasing 2nd gear and applying 3rd. The loaded drum and servo spring that you bought from other sources may be a mismatch with your vb. Not all valve bodies work the same. You may need to change or add springs to get the overlap correct. You really should call Cope and ask.