What to do...

I voted for the most obvious. Yet a Slant 6 under boost would be interesting.
:read2:

Heck yeah, 100 bucks for a used turbo, 100 for misc. tubing and welding, and a carb hat. strong 318 performance and 23 MPG. Look at allpar.com and turbo 6. might do it myself. Cheap. like this example:



These cars looked like they were designed for a turbo installation.