Confused yet?
I believe the wheel you are looking at will fit the 75 key in column truck just fine.
The main differences I have found are between tilt and standard columns, the spline for all the interchanges I have attempted have worked out straight column to straight column, no problem.
For instance, I have used the 4 spoke Omni/Horizon rubber rim wheel in both my '85 and a previous 93 D150.
Tilt to tilt, to problem.
AND, I am pretty sure the tilt columns have the same spline as GM vehicles, as I am pretty sure the tilt columns are built by Saginaw.
I suppose I could be wrong, I DID get married once ...