Fulcrum Racing 5 LG freehub replacement - drag
After a couple of email exchanges with Campagnolo technical services of North America, I've confirmed that I correctly installed the new free hub (but you should do this carefully, as the pawls and/or spring can be damaged with too much pressure or twisting).  The technician confirmed that the new bearings could be a bit stiff as they &quot;break in&quot;, but that things should loosen up appropriately.
So, I will put some miles on and confirm this as the answer once things loosen up.
Edit:  After about 100 miles (160 K) the bearings have loosened a bit and the wheel is spinning without dragging along the crank.  So, I believe that in this case, the new fulcrum freehub body did indeed need a break-in period.
Also:  as long as your wheel was stable on its axle before replacing the freehub body...don't mess with the pre-load mechanism.