Marty, A freind of mine with a 72 Z installed the same springs and his car ended up higher. They did not 'settle'. He cut the springs either 1 or 1-1/2 in. to get the height he desired. Like 2manyZ said in his reply my 72Z also sat lower in the rear with aftermarket springs. I have never been happy with that so I will be cutting my front springs to get the setting I want. When I get done the rear end will be approx. 1/2 in. higher than the front. I personally do not like look of a level Z.