I've seen several 440 4 speed cars with 8 3/4 rears with 3.23 ratio, I think all the Hemi 4 speed cars came with Dana 60 only, 3.54 or 4.10 ratio while the 440 4 speed cars could have come with the 8 3/4 with the 3.23, 3.55, 3.91 and maybe 4.11 ratio