a 2" puck up front and a longer shackle out back is the cheapest way to get a bump since starting around 3" you need to replace more parts and then at 4.5 you need to replace even more parts and at 6" even more part still. each inch costs more than then last.
and that doesn't even include new bigger tires, better gearing, better bakes... there's no end to the craziness you can do.