You don't need to disconnect them at all, just pull the spring clip that attaches them to the strut and all will be well. I have been running both of mine with the brake line not attached to the strut for a long time now with no problems at all.
Slap those spacers in there. If the rear shocks come off easily, the back will only take you MAYBE 1/2 hour TOTAL to put them in. Up front might take a little longer, especially if you're doing the strut mount flip at the same time, but it's not that bad at all and you'll love the extra height!