['ol Pinion head]

Am sorry I derailed the Judge pic topic.

On the boxed frame no posi Z16 Chevelle deal, those cars were really expensive for the time, and the well healed buyer that bought one, surely could have afforded an extra $40 on the invoice for PosiTraction, so not sure how accurate my early comment was about keeping the price down. One would think quite a few dealers would try and order an Eaton posi in their Z16's. With the boxed frame, partial boxed lower sway bars, and the 7/8" rear bar, there had to be less frame twisting than with a std frame and open rear arms & no rear swaybar.. Not sure how many on here have ever examined the factory boxed lower control arms on a Z16, but they were basically robbed from the early 442 parts bin, and the sides of the lower arms eventually cracked where the partial bracing stopped. They are not like the later boxed lower control arms.

On the 389 and 400 GTO converts, plenty of them were ordered with Safe-T-Track. It just seems odd that so many '70 and '71 455 equipped GTO converts, ESP automatic cars, were not ordered with the Eaton posi carrier. Near 500 ft lbs of torque at a lower rpm, and no posi...Hmmm.