Quick Steering box ID

Hey No Bux Dart,
You are right...they were available. I used to own an original '65 Valiant 273 Commando with manual steering and decided to install a "newer" 1971 Duster 340 manual box and the lock to lock were less on the '65 than the '71. It was very noticable. BTW, this was back in the early '70's so the '71 was almost new. Sold the car to a friend and he still has the car. Will track him down and see if he still has the box. May be able to find some markings on it.
As for power steering...I looked at a '71 Cuda that had a rear sway bar (handling package) and it had the quick steering box. It had a "TA" casted on the top of the box. I compaired it to my '70 Cuda and '70 Challenger RT and none of mine had this markings but then I don't have the rear sway bars.