Last trip for Marvin still being an air-cooled bus, carrying his own replacement parts.

Lets start by measuring the Golf deck height.  From the center of the engine shaft at what was the current installed angle to the top of the deck lid as flat. Record this.  Measure the bus deck height.  It is going to be about 15mm too tall.  Rotate the engine CCW a few degrees. Fits now... 

Forget the deck height.

Figure out what that angle from vertical actually is on the Golf. Record it. Transfer this critical angle to a large center drilled AL plate with both the engine and transmission bolt pattern.  

Machine a groove in one side of the plate to match the bell housing ring.  

Thank you to American Fabricating of Ann Arbor, MI for the shop time, 21 years later.

Machine in the pockets for the bolt heads/studs.  Hammer fit.

Machine away all markings.

Forget the angle.

This is of course of no consequence to this project, but it does throw a wrench in reconstructing the actual parts created for others.  Pictures work though, with some patience.