I'll look for a part number on the VB when I get home tonight.

The PR valve does have a spring within a spring as that is part of the Transgo TF2 kit I just put in it.

Trans was upshifitng at lower RPM before I pulled apart at WOT (about 4400 rpm). From what I read that sounds about right (stock) as trans was from a 3838-2 bbl car. Was going to see if they increased after the TF2 and adjustments before considering changing the governor parts with weights from A&A, but now I will pull that apart to make sure things are moving freely there.

From my reading I thought the later PT kickdown will work on an earlier VB, but it just won't have the feature that downshifts (3 to 2) won't occur after about 40 mph... again I'll look for some casting/part numbers later today and post.

Thanks