Geo Metro XFi drivetrain in a CRX!
Some of the swaps I've thought about
:
VW TDI ALH engine in an S10 or Ranger
Yaris diesel engine and manual trans in a Prius
CRX HF or Civic VX engine in a Civic Wagon
Cummins 4BT in an older Chevy pickup
Nissan LD28 diesel in a 240Z/260Z/280Z
Metro 3-cyl in a Samurai