Whoa guys! The 4-speed was available behind the 64-65 /6. It had a lower first gear than the V-8 transmissions. It would fit the same bell housing as the 3-speed manuals.
The 4-speed didn't show up behind the /6 until 75 or 76, and then in OD form. The 833 OD has a larger front bearing that requires the newer bellhousing to go along with it.
A Hurst Competition Plus for the A-body works fine on the 833 OD. Just remember to reverse the 3-4 lever on the transmission.
