383 w 6 pack set up opinions?

There was an artical in one of the mags that showed the 6 pack intake gets with in 20 hp of the new 4 barrel intakes designed today.So they may be an old design but they were ahead of their time.these promax bases are a nice upgrade,makes fine tuning alot easier http://www.moparmusclemagazine.com/techarticles/mopp_0801_mopar_six_pack_tuning/photo_02.html