Im not the most experienced person on this board but,
My guess is that you are in better shape now than you were 20 years ago because your job experience gives you a huge advantage. Your UGPA will still be counted even though it dates back a while, and if you graduated with honors, your gpa is probably very competetive at florida U. If you take an extensive Kaplan course there is no reason why you shouldnt be able to score the 160-162 needed to get in.
I had a diagnostic of 150, and i am now scoring in the 160-164 range after about 4 months study where i put in about 75 hours of studying.
Personally i prefer powerscore, just make sure that Kaplan uses actual LSAT questions and you will be fine.
Hopefully some one else can jump in here