10/82 the H55F five started in some 40 series, because of that the front of the hump and inspection cover changed shape. This was in in all models including the long wheel base which never had the H55F option. The 1/79+ A pillar was harder to replace a 3/4 tub. The change in the hump adds to that.
The H42 and H41 still used a cast iron top plate. The H55F started 10/82 and those the top cover was made out of aluminum. While not as shinny this is what the top cover for the H55F had in the 40 series.
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what production date John ,
did the H42 and H41 update to the Aluminum shift tower ?