I have installed a 12 bolt out of a 69 chevelle. With solid lower arms I cannot get the bolts to line up with the arms. If I take out the solid arms and use the factory rubber bushed ones they fit but rearend is off (thrust line) I have tried installing lakewood lift bars had to fight to get these in and the brackets where at different angles and thrust line still was off. I saw that the Southside machine bars where left right sensitive so I tried swapping them and they are still off. any suggestions would be appreciated