Since it is assumed the crank was not quite as new I would drive fairly easy and avoid high loading situations for the first few hundred miles. Probably no scientific basis but it will not hurt to do this in my opinion. The oil cushion has a better chance of staying established till a slow burnishing adjustment takes place if any is needed. I know that should not happen but in the real world suspect it does sometimes with no real damage resulting. For example the oil cushion can have greater difficulty if there is a slight taper present on a journal.

If the rods were exactly as new, crank in the same condition then it probably would not really matter at all. Yet I would still baby it a little for a hundred miles or so. Any evidence of the old bearings wear pattern was probably lost when the original bearings got so hot.

This thought is based on a rebuilt engine a long time ago. I advised the guy to drive it conservativly for a few hundred miles. He drove it right away on the highway at about the engines max rpms. Threw a rod.

The exact true cause of this problem was unknown. It was an english car back in the time when some of their engines needed a rebuild at about thirty thousand miles. At least I did not assemble the engine. In retrospect they were pretty fragile and not really designed for north american highway use.

Certainly there is no way to know if driving it easily for the first bit may or may not have made any difference. Erring on the side of caution is usually worthwhile especially if any unknowns are present. Again just my opinions and others will vary as they should. I can only hope there is tollerance for peoples gut feelings and opinions. I know I have no absolute science for this one.