Sean, I have located a company that offers a lesser priced alternative to the DEI and NOS versions of the chiller. Heres a copy of what the owner said about his system which attaches to the front of the intercooler only.
Its like 150-250 dollars complete compared to 400-500 for the other companies kits.
If you are already making 750 RWHP you could see an easy 50-85 hp gain even more. A customer with a
500+hp Supra made a 60hp gain at the rear wheels.
http://www.intercoolertechniques.com/Dyno.html this is the dyno to prove it. Since you are making quite a bit more power than the supra you are looking at
some real nice HP #'s. I leave my bottle in my car all the time, no problems here. I would recomend a 5lb bottle. The last about 15+ passes down the drag strip, and the bottle is much more easy to store in a smaller car (viper)
Please let me know if you have any other questions
Chris Rogers
www.intercoolertechniques.com
913-290-0713