disconnect the front swaybar from the endlinks. you can replace the front coilovers without disconnecting, but it gives you MUCH more room to work with if you do disconnect.
You can also disconnect the front sway bar from the frame as well. Most suspension kits come with a front swaybar relocation kit so you'll have to disconnect the swaybar from the frame anyways to install the relocation kit. You could just disconnect it from the frame first and work on the front coilovers, then install the relocation kit when you're done
But don't do both (disconnect swaybar from both frame and endlinks), that'll make it very challenging to get the swaybar mounted back on.