This is the part you are looking for...they replace the output shafts that have the drive-cups built into them. They stick out of the sides of the diff and allow you to attach your stock plastic axles to them.
-Chad › PM ME IF YOU HAVE THE BELOW: › VBS, CVDs, GM Single-Speed, OTB, Ultramaxxed, Super6, Strobe, Sprong, CNR Brake, UE Hex, DUH Towers, Predator, Blackbird, GA Blue Screws, HCR F/R Skids & Mutant