Collapsible steering column options ?

From the 1967 Dart Press release:

"Also standard on all the '67 Dodges is Dart's new energy-absorbing steering column, designed to "telescope" at a controlled rate under head-one collision conditions. Instead of being driver rearward toward the driver on impact, it collapses. And if the driver is thrown onto the wheel, the column telescopes even further to reduce the force of in-car "second collisions."
The safety steering column consists of a telescoping shaft with upper and lower section connected by plastic shear pins; a three-piece telescoping transmission selector torque tube; a column jacket designed to collapse in "accordion" fashion; and a mounting bracket that connects the column to the instrument panel but blocks rearward movement of the column on impact."

From the 1968 release:

"The impact-absorbing steering column jacket of 1967 was made of two section of tubing with an expanded section welded at each end. In 1968, design improvements -- including a single section of metal with perforations stamped during fabrication -- make the unit stronger, yet more yielding in case of impact."

So there were changes in the collapsible steering over the years. I'd imagine a unit from a '67 might be a different length that the '68.

There's also modern aftermarket units indifferent lengths:

http://www.carlsracing.com/category/parts-categories/steering