I wouldn't drill the LCAs. In fact, in the front, I don't think theres even room to drill them in the right spot. The last thing you need is to compromise the structural integrity of your suspension components... hit a curb and they're liable to break.

I'd just pony up the dough for the appropriate LCAs. Any 94+ teg ones will work, also Si, EX will work up front (and in back, depending on if the EX came w/ a rear bar).