[Ziegelsteinfaust]

Personally I believe these are just slightly upgraded Fuelie or camel hump heads in aluminium which is a nice twist. Other then that standard 95+ Vortec will still lay down more power mod for mod.

Years ago I bought a set of gmpp double humps, and spent countless hours polishing them up. It ended up less powerful then my afr 185 headed 350 with a smaller cam.

So unless you want it to look period correct I would look elsewhere for heads.

I am sure they have a purpose, but it highly depends on what you want.