Only the earliest cars had those. Mine has them too. I think they were added the raise the motor, because there were problems with access to the no 4 and 8 sparkplugs. Later the frame was changed and the motor raised.
Thus, on early frames the motor sits lower without the plates. I have mine mounted on the outside (lower) side of the frame, and use them as jacking points. Consequently my motor sits lower.
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