I took the engine apart last night to take a look.  I never have removed the piston from the rod, so they are still matched at least.  Both sides of the rod had a chamfer, but one side appeared to be ever so slightly more than the other and that side was facing towards the back.  I reversed it and put it back together.  Everything feels smooth.  I will try to put it on a stand sometime today or tomorrow and come back and report my results.