Ed - Frequent question here on the SB forums.
It's unusual that a California truck would have the driver's door hingepost ID plate still in tact.
The number in CA is typically the engine number of the truck when originally titled in CA, so it might have been the number off the original 216 or ??
In either case, you would be well advised to approach DMV to CORRECT the number on the title when you retitle the truck. Explain that the VIN number is to an engine that is no longer in the truck but that the original chassis ID plate and number are there and would be more correct. Since it's original, it's not a change rather a correction. Be sure to phrase this as a correcting a mistake, and not "changing" the number as there is a distinct difference for obvious reasons.