Anyone with feedback on the Manzo shortie headers?

I saw these big block headers on ebay, they are center dump shortie headers.
http://www.ebay.com/itm/like/111225827877?item=111225827877&lgeo=1&ttle=Manzo+Stainless+Steel+Mopar+Hemi+Headers+Chrysler+Dodge+Plymouth+59-78+383+400&vectorid=229466&tc=US&rmvSB=true
Anyone tried these in a 70-72 dart that can give feedback on the fitment or issues with them?
My particular application would be on 71' 383 motor in a 71' Dart with power steering and power brakes.