That's a good way to ruin a bus and two veedubs in one fell swoop. Having said that, I'm a deadhead and it was buses like the one in the link that got me into this whole bus thing in the first place. That was back in the early 90's. My ideas have changed a lot since then. I'd use the vw's for what they are and just raise the bus' roof a whole lot. But that's just me. Its still cool to see folks are building buses like I used to see on Dead Lot and Shakedown St.
I have to say, for a funky hippie conversion, its a pretty rad one!