They should slip on the spindle. Press into the hub.
The ID measurements you provide for old and the potential replacements illustrate just why and by how much they don't fit. This shouldn't be a surprise given that info.
I haven't worked back from the cup & cone set numbers I provided to compare to the separate cup and cone numbers your parts guy found.... Are they the same?
And what about the advertised dimensions?
Jeremy said, rear axles. Rear wheel drive cars/light trucks only have spindles on the front wheels. But I am not an old Chevrolet expert, yet. So I caught an error or will shortly learn something new. Jeffrey
