i just hate digging up old threads but
the cheapest way to go would be fitting a sc12 supercharger the ghetto way and running a suckthrough using the old carb pumping it straight to the inlet manifold. its been done many times to 4k motors in malaysia, and only god know how much more ghetto they are.
you dont need to fabricate j pipes and pressure boxes and shit.
and if people are tellin you that you can put fuel through a sc12 coz of the teflon, tell them to get fucked and being ghetto isnt for them.