Thanks for the compliments guys.
The chin spoiler is just a 69 camaro front valance.
I think I got it from auto metal direct or something like that, you can get them all over the internet for about 75-85 bucks.
As fast as moving any actual air, I'm unsure, but if I has to guess, I'm guess it does help clean up some dirty air under the car, and push some up into the grill area.
Unfortunately I never got to drive the car any substantial amount to have a before gauge of the effectiveness of it.