Considering methanol is about $5 - $6 a quart ($20 - $30 a gallon) the mileage increase is more a step backward from the economy standpoint. Heck, at least in the VX you could put the DI drivetrain from an '04 Axiom or Rodeo in and get an increase in HP, torque and mileage plus a better tranny. LOL, if he'd stayed off meth he could've afforded another fill-up!
Knock yourself out Moonraker, I can get you some genuine ground plane isolators that should net you another 5HP by freeing up bound electron isotopes trapped in your chassis.
Looking forward to your Baja report.