few questions about air bags... slammed67?

[67'ShortMonster]

Hey,
I am thinking of taking my 67' 4x4 project and putting it on a 2wd frame then dropping it down. Just curious to what kind of drop you are getting with putting in the air bags. I know the 4/6 drop is a popular one. But, what is a air bag set up equal to... when it's aired up.
If i go ahead with this... it will be a 67' shortbed fleetside, with trailing arms. It would actually look alot like slammeded truck i would think... Which i might add looks like a beautful truck.
Also, how would the air bags handle 400 HP. I might have a lead on a engine from a 99 firebird 5.7 i think... Not to upon on the new chev engines... but i would hope to hook that to an auto somehow if it can be done... turbo 400 i would think.
I am also hoping to find a way to go all wheel disc brakes, maybe using the 99 firebird stuff. the car is a roll wreck... so every panel is full of dents, and there was no issurance on it... so it was a right off...

i would like to find out about the air bags a little more though, so i can plan this out a little better than the first time i started this project as a 4x...
I was gonna give up... but i gotta finish this chevy.