Nope. U17 included the clock.
What probably happens is the plastic dash housing gets replaced, new one is not cut for the clock. The reproduction I bought wasn't and it is a bit nerve wracking to cut it without scratching it. Since the clock doesn't work and the stem is usually broken, easier to just leave it off.
From the PDF:
Gauges (U16 or U17): The U17 gauge option was an option on any V8 car and required the ordering of a console. It included the tach, clock, fuel, oil, amp, and temperature gauges.