Looked at a Scamp today

72 was the last rear for the 8.75 rear (doesn't mean someone didn't put it in a 73+). The stool mount and Big bolt pattern brakes started in 73. If it is a 73 and has disc brakes use the entire front end. Oh and if you're not sure if the k frame was converted to spool mount see if there is and opening on the bottom of the k frame. If not is a 72 or older if so then is a 73+. The spool mount k frames have the sway bar runnin through them while the 72 and older have them in front of the k frame.