I don't seem to recall any deadly head seal leaks with I-4s.  After all, the
objective is to replace a WBX with known design faults with something more
reliable and perhaps with better performance.  What if 180 lbs-ft of torque
from 2000 to 6500 rpm was available in a modern motor that didn't require
raising the deck lid?  or maybe just a decent 125 lbs-ft from 2500 to 6000.
The vanagon WBX was a problem for VAG from day one.  Remember this box is a
"truck" not a "sports car".  In a camper version it is underpowered,
underbraked and poorly suspended and it's at least 12 years old.  You can
change that.

cheers,

Pensioner
89 Syncro Westie- SVX