Ditch the lot. Put in the 9". I started in my Camaro with a 12 bolt, LSD, 28 spline. Over one season I f*&%ked the lot. Minimum you need a spool. 35 splines will be reliable too. I was running a single leave setup with tramp bars. Tore that out and put in a Competition Engineering, Ladder Link setup. Sooo much better. I had a 496ci, switched that for 572ci with 275hp nitrous. Over 1100hp total. The rear end never failed. Like they say, do it once, do it right.