A-833 OD in Aspen... not the right one?

HemiEd said

TNT440, I sent you a PM. I have two nice abody O/Ds that I am not going to use if that would help. One is a 75 and the other a 76 if I read it right.

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Just for interest sake, do your A body transmissions have the small (904 size) of the large (727) size output shaft? The A/F body one I have takes the small 904 size slip yolk. The truck ones I have use the 727 yolk.