“Hemi” style rods for small block?

Is anyone familiar with P3614514 small block rods? Found a couple references online and an may have located some. The literature say that they are heavier than a regular rod and he weighed one at 2 lbs, 0.5oz which converts to 762 grams (Edit..That conversion is wrong, would be ~922Gr) . but the boxes have numbers on each end that look like weights and when added come up different. 182.1 + 432.4 = 614.5. I thought a stock 340 rod was more like 750g? Not sure what to make of that.

"Hemi" style rods for small block?
Author: gzig5