Moving the front of the bar will change the pinion angle,but so will taking 1.5 inches or pre load out.When I had a ladder bar car 15 years ago I know I had pre in the right side.I think I set the front rod end hole .5 in down on the right side with the left side bolted up then raised the right side of the car to get the bolt in.Double adj. bars make it easier.Should be a fun car when You get it right,or good enough like I end up most times.Good luck.Bill.