Wish someone with more experience this engine type would chime in. If journal checks out I would think you can rebearing #1 rod without pulling head or piston assembly out. Most important is that the journal is not scored up or rough and still appears pretty good. I do not suspect rod end has stretched to any degree. Also try to get a good look at bearing shells to try to determine type of bearing failure that occured. The reason I would try to plastigauge #2 is just to get some indication of other bearing wear and to see if #1 was an isolated occurence. Of course #2 is going to be nowhere near as bad but will help you have perhaps a little more confidence in engine if still not at outer limit of specs.