How i've heard or known people to run it easy for the first 1,000 miles. Change your oil/filter the first 100, 500, 1000, 3000 miles, then go your regular cycle (which should be ever 3,000 miles anyway IMO).

In my opinion, with the money spend on a good rebuild, i'd use the procedure above. You can't be too careful and I wouldn't want any doubt I didn't let it settle in long enough. 1,000 miles is plenty...