Well, Caltracs!, that explains a lot.
I have a GVod behind my Commando, that I use as a Splitter. I shift that at 7000, with a factory Heavy flywheel thru a CF diaphragm, into a 3.55 posi, into either 295BFGs or into 325/50 Drag-Radials.
Into third, my road-gear is 6.92 versus your 6.38
I have...