Summit carry,s them or Moser,Strange Axels.I run a stroked 340(452hp) with a 4 speed.My 8 1/4 would handle any punishment(burnouts,shifting)It wasn,t until I put slicks on at the track,then it was all transfered to the axel and snap!If you plan on modifying your 360,you might as well go with the 8 3/4 and save time and money ahead of time.Do you plan on racing(with slicks)If not the 8 1/4 will work fine.The c-clip eliminators hold the axel in incase of breakage.They don,t replace the clip itself,they mount at the end of your hub.