Ok, I got a 94 civi Caprice Classic with the grand daddy suspension. Recently I put around 250 lbs. worth of stereo in the trunk. Now the back end sits really low and the front end is raised up. I'm planning on moving this audio to a 9C1 soon, will these springs be stiffer? Also if I put Impala springs on the 9C1 to lower it will these hold it somewhat more level? Thanks.