Okay, I have a 12 bolt for my 79 Malibu. I bought upper double adj. control arms but at their shortest length they are about an inch longer than the stock. I thought they would have to be shorter. Would I be right, did I buy the wrong ones? Also the spring perches are mounted off the front of the axle tube. The stock g body's are mounted on top of the axle tube. If I use the longer control arms on top the spring perches appear to be directly below the frame spring location. Wouldn't this put the rearend 1 - 2 inches farther back under the frame. Is this normal? If not what do I need to do or get to make this right?