Battery Isolator Kit

Hey everyone, got a question for you all. I got a 91 bird with a 5.0 with just basic bolt on mods, but my questions is, has anyone here used a battery isolator kit to relocate the battery to the trunk? And if so is it hard to do?

Here are a couple of informative threads ....
battery in trunk (http://forums.tccoa.com/showthread.php?t=71940&highlight=battery)
Battery in the trunk...PICS (http://forums.tccoa.com/showthread.php?t=28118&highlight=battery+trunk)