Pad on bottom rod definitely is smaller relative to the upper rod, though it still might be all out of the factory condition. Does the pad of the bottom rod look like it was dressed on a grinder/belt sander, or does it have machine tooling marks?
Looks like bearing shells are still in the big ends of the rods, pull one apart and check date code on the back side of the shell, that will let you know when it was touched last.
the stock rods are very good. we ran a set of 496 rods with trw pistons for 1800 passes @ 7000 rpm. never broke a rod. they had mopar hp bolts replaced every 4 years. that relates to 18 years of racing. mopar built their stuff to last.