I have one in my almost OBDII '95 and it works great. If you take the screw out that holds your OBDII connector to the fuse block, and you are good at Tetris, you can hide it all behind the cover.
From MUD...new hotness for the old loads. http://scangauge.com/support/xgauge.shtml
I watch the intake air temps compared to ambient. 4° with snorkel on..... about 60° with snorkel off.