I have to disagree. The rods on all late model 5.0's, or any 5.0/302 for that matter, are the same C8OE, or D1OE forgings Ford has always used.
The difference is in the crank itself. 28oz cranks need 28oz balancers, and flywheel/flexplates.
50oz cranks need 50oz parts.
While having any combo...