[Nismodriver]

If you're really hung ho, pull the exhaust manifold off and see if the DE gasket fits the ports. Thats all I have to offer. I also think a Under drive crank pulley for the DE could be made to work. You guys should start hitting the scrap yards, spend some time tearing stuff apart and making some comparisons. Just my thoughts.
John

 

[Nismodriver]

I remember a guy a few years ago, that had a B12 wagon who had Hotshot modify one to fit his car. I doubt they made a jig of it, but it may not hurt to give them a call on it.
John