TTI Shorty Headers For Small Block - Anyone Try Them Yet?

Curious to see if anyone has tried these shorty headers yet, how the install went, ... Based on mock ups I have seen they look like they will connect well to the TTI exhaust system used for stock manifolds and will clear components well. I know I would lose some power with this design but that is not a real concern for me.

I have not found any good information on the web as of now so any help is appreciated.