Some Questions I would like to interject into this thread. 66 Dart with a slant six, right? Is the bell housing you are working with cast aluminum? What kind of clutch linkage do you have? I'm up to my ears in a 65 Barracuda /6 trying to convert the 904 to A833. I have an aluminum "truck bell housing." (circa 1978) My A833 is a 1965 with a four-bolt flange type output shaft. The opening for the bearing support in the bell housing I have measures 5.125, my bearing support measures 4.354. there is a reducing bushing availible which is one hurdle to overcome, but the real issue is the overall clutch linkage of which I have all of it. Pedals, rods etc. The issue is the linkage will not work with the bell housing I have. Z bar pivot, located in different position, I could solve all of my problems by buying the right bell housing from Brewers ($500 before shipping), but I'm not ready to cross that rode yet, until exhaust all of my options. If you come up with a fix on what you are doing, I would be very interest in what you did. A 66 dart /6 is not a great deal different than a 65 Barracuda /6.
Norm