I was always under the impression that the cases were pretty much interchangeable. The primary difference between the Hemi box and the standard 833 was the input shaft and gears inside the trans. The input shaft diameter and teeth count is the fastest, easiest, and probably the most reliable method of determining a Hemi box. If the input shaft is correct, everything inside the box pretty much has to match. Once you have seen a Hemi 11 spline input shaft, its pretty easy to identify the difference between it and a 23 spline input shaft.
There is a difference in the main case and tailshaft housing for B bodies 68 and 69 , vs. 67. The 67 had the 307 bearing and the smallblock size bearing retainer , in 68 they went to the 308 bearings which required bigger bearing bores in the front of the case and the front of the tailhousing.This also required a larger OD on the bearing retainer on the front of the trans, the id of the bearing is the same so Hemi guts can be swapped into 307 bearing cases, which one would do if trying to make a hemi trans for an A body ..
But the trans above is clearly not a Hemi trans ...
