Dan,
While the factory rods are strong enough for your application, they are rather heavy and this places high loads on the rod bearings when used for the track.
Aftermarket rods such as Pauter, Arrow, and Carrillo are lighter (as well as having stronger fasteners), this pays real dividends in reduced rod bearing wear. Given that this is one of the "Achilles Heels" of these engines, I think these are very worthwhile for cars that will be used extensively for the track.
I would also not use Glyco rod bearings in a track car, but thats another story.
