The most simple way is to swap in the 2.4 liter engine and use Megasquirt or something if you want to turbocharge it.

If you're a glutton for punishment, you could try working with a kit like this one:

http://www.ecotrons.com/400cc_to_800...e_EFI_kit.html

People have done blowthrough setups on Weber 32/36 and 38/38s before if you're more interested in turbos than EFI.

Maybe someone more knowledgeable will chime in. Good luck and let the board know what you find.