Need slant heads for OHC project

I like the idea of a OHC slant six. I read about the prototype from the 70s and thought it was cool. I'm guessing you'd just need a way to put cam bearings up top and put a longer timing chain/ belt up to the valve cover somehow plus a whole bunch of other things I know. Would you want to take this a step further and add oil activated variable valve timing and find someone to make a new cam with a third lobe for each cylinder? That would be ultra cool. I'd buy the hell out of that.