Big end is Mopar from what I measured with my calipers. I'll use my mics to get an exact measurements. I might just slide the rod and bearing on my crank to see how it fits.
The length appears to be stock just by comparing with a stock rod but going to measure them.
YR....lots of steel to steel used on high end engines. The Pankls I have came from Hendrick and that is how they are. My late buddy Jim Watson was a crank specialist for Rousch and he said that's what they do.