i think the best place for you to jack and support the car will either be the sills where the grooves are cut out, as they are the factory jacking points....or directly under the chassis itself. if you start jacking the car up on relatively large flat areas the jack can slide around ie on the crossmember or lower control arms, which i know people who do and i hate it. if you are worried about it bending the sills get an old bike tube and fold it on the plate on the jack then jack it up.....? :/