I have a 1975 cadillac eldorado I purchased 20Inch rims and I have a little rubbing in the front I was wondering how can i pick the car up at least an inch in the front I'm having trouble finding a shock that will do that and there isn't any springs in the front

Not to familiar with this car I see. Adjust the torsion bars, look under the center of the car for the torsion bar anchors and adjusting bolts.