Mr. Ratrod, et al.,
I haven't posted much on the forum, but I have experience this installation. I managed a 2-man Mopar resto shop, Viau Motorsports in Lake Elsinore, CA from 2006 to 2019 and I've installed at least a half dozen Borgeson steering boxes into Mopars, including a 1964 Barracuda. The first install was featured on the online magazine Street Muscle Magazine, on their 1965 Belvedere. I've also worked with Cudamark from this forum, most recently on his red convertible.
At the shop, we used the Bergman adapters exclusively. Good product and straight forward install. For the '64 A-body, the center steering column shaft is interchangeable in the outer steering column housing from power to manual steering. The steering shaft length is one difference between power to manual steering set ups.
You can swap your steering column center shaft for the shorter power steering shaft. It should be from any 63-66 A-body. Or what I did was cut down the manual shaft to the power steering length, then redrill for and press in the coupler cross shaft. Using the Bergman adapter should keep you in the factory adjustable range for centering the shoes in the steering coupler.
For steering pumps, we used Saginaw style and the Bergman conversion hose kit. Hot rod fabricate as needed.
