well tomorrow i'm putting the nitrous kit on, but first i'm swinging by the store to pick up a b&m fpr and some gauges. I'm buying the bezel that has inserts for two gauges. One I have already decided should be a/f ratio. What should the other be? Fuel pressure, oil temp, exhaust temp, etc?

 

Fuel pressure, nitrous pressure, and a WBO2 if you can afford it. You can get a bottle mounted gauge for the nitrous. They are cheap, accurate, and your pressure won't be changing drastically unless you light a fire under the bottle. It would probably be beneficial to get a fuel press. gauge that you can see while driving, but I'm just running an underhood gauge that I check before I run.

 

you don't need any of those... get a bottle heater, pressure gauge (bottle mounted) and a wideband o2. You'll love me after you get the bottle heater... its night and day difference.