Wasn't J65 part of the Buick, ahem, "Trailering Package?"
A former client of mine was at Buick
when that was being cooked up. Turns out more than one engineer in Flint needed a new RWD tow car for a race car... and a better way to get the kids to soccer than the dustbuster minivan.
So, they basically stuffed the entire 9C1 Police Car into a Roadmonster, and had a car of supreme quiet and refinement that would scare holy hell out of anything south of a Corvette... in particular, the Marauder.
Of course, Buick being the fuddy duddys they tend to be, would have nothing to do with a "performance" Roadmaster, and rather than kill all the good work, hid it in plain sight in the order guide under "V57 Trailering Suspension" or something similar.
Back to the first part, though: I was 99% sure the stawag came with 4-wheel discs and the better brake linings. Or is my memory permanently toasted
