all the boxes will physically interchange in a and b bodies. Slant six a body boxes are lighter duty inside. I think the used bushing instead of bearings. However Pittman arms are a different matter. Pittman arms are specific to a & b body. I dont know about c- body boxes. I BELIEVE the boxes are the same as A and B. One time though I tried to use a 64 A body box in a 67 A body ( or was it the other way around?) and the hookup with steering wheel input shaft was different, even though, yes, the box itself was identical. Also remember manual and power boxes have different lengths, so u need to adjust one way ot the other at steering wheel input shaft. Neal ZImmerman, Eugene oregon ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.