... I wouldn't waste my time on Fins. Fins just doesn't have anything challenging.
My opinion on Fins is that it's good for beginners with stock suspensions. Even I was bored 95% of the time. There was one climb with a bypass at the beginning of the trail that gave people trouble but my Hundy did fine on it. There was another long steep climb that about 1/2 the people attempted. I don't think I'd ever do Fins again. The pic below was me on the first climb that was a little challenging (for me). The 4Runner couldn't make it up the climb. But he had a manual tranny and open diffs. The last photo is what 80% of Fins is all about.

and since i am strongly considering a nontoy drivetrain swap as opposed to redoing my 197k FZ, the timeframe is just more aggressive than i can pull off (or at least commit too in a week)... 