Alcohol Injection Systems.
http://alcoholinjectionsystems.com/ Top-notch quality stuff there. I've been running my system for several years now with exactly 0 issues. Lots of Thunderbird guys in the area running them, too. The only add-on that I'd seriously consider is the dual nozzles. I actually have 3 now, haha.
I would use a boost controlled system for simplicity's sake. Being you have a centri blower, I'd strongly consider a progressive controller.
If the car is tuned properly, there is no need for all of the 'safety' stuff. Unless you have some sort of aftermarket ignition system or standalone ECU, those safety boxes can't actually do anything to change the tune to make it safer anyway.
You can get a low-level sensor if you like, but I look at it as one more place in the tank that might leak.
I would strongly recommend against using methanol injection as the actual fuel unless you have a standalone ECU that can add fuel in the event of a failure. If you lean out the tune for the methanol injection, and then have a problem with the meth system, your OEM ECU has no way of knowing this, will go very lean, and the motor will likely go pop. The only safe way to tune for methanol on a stock computer is to set the air/fuel ratio with NO methanol. DO NOT TOUCH this again. Then, get the spark timing correct with no methanol also. Now, turn the meth on, observe the drop in air charge temps, and ramp in timing accordingly. Don't be afraid to spray a lot of water/meth to cool it down(I spray 17 gallons/hour of 70/30 water/meth). When done correctly, this will make power, and will be 100% safe (remember the AFR and timing that was set before turning the meth on?). You are taking advantage of the detonation resistance properties of methanol by doing this, although not all of it. That's the trade off here: you
could lean it out and make a bit more horsepower, but that's very risky and not something I'd do on any stock ECU car.
If you want the full benefits of a higher octane fuel, switch over to E85.