I know what you are talking about. the LCA hits the subframe metal to metal and you still need 1/4" of travel. you need 21mm socket and 3" extension. lower the sbframe to get that 1/4". you might get away w/ two bolts on the side where you are working, or you may need to loosen the other side a little. either way you don't knock it out of alignment if you are careful.
also, depending on what struts you have you may have about 1/4" of travel of the knuckle up the strut. don't neglect that. take the strut pinch bolt out to use that travel too.
every 1/32" helps.
btw, I honestly don't see how one can compress the spring in situ not with rental spring compressors from autozone I don't think...
