A guy I know that comes to Buses by the Beach has done this conversion.
His tag on theSamba.com forums is fastwagens. He's full of good info.

On 5/27/08, Cullen Stewart <cullberly@vermontel.net> wrote:
> Now that I have been enlightened about the mounting angles for an I4 conversion does the same hold true for a VR6 conversion? I drive a Fox and I am used to the engine being mounted vertically.
>

--
Roger
'89 Westy "The Moose Lounge"
'86 GL Sugaree