CalTracs want 1-3 neg degrees of pinion angle relative to the trans. Its hard to answer any questions you may have without knowing the cars set up. Like how much preload,what rear shocks are set at,what size tire and air pressure,top or bottom hole, how much converter,. Most of the average 10.30-10.60 et car would usually 60 in the 1.40-1.49. Some well sorted out will go much better. He has allot of good parts there so it is got to be just the set up or combo and not to throw more parts at it. We have stock front end with dbl adjustable afco's and we 60 1.28-1.32. So he allready has more then us. So there is some work to be done.Jake