I have one very similar to that on my '96 Ford Bronco and it works perfect for lifting it off the body. I'll see if I can find a picture of it but it does work nicely and doesnt leave any marks on the actual top itself like it did on my JKUR from the straps.
Yeah, but you'd have to unbolt the inside brackets from the roll bars. With this style of roof rack, the mounts just connect through the hard top, not to it.