E30 Zone

I'm currently on my way to twin turboing the M60 and need some choices on the exhaust manifolds. Does anyone know if any other bmw 4pot lumps share the same or almost the same flange pattern?
I don't want to cut up my m60 manifolds that I've made for the e30, some else can benefit from the headache of making a set.

Twin turbo e30 v8, turns me on. Supercharging has been done and easier I think with over 500bhp.

Who said I wanted a easy project
Supercharging sounds ok but I'm really feeling the turbo route at the min