i agree no magic fix. make sure its in good tune, and if you aren't really good w/ carbs (i'm not) find a good shop, with an old guy working there. they will have an exhaust analyzer, and they should be able to dial in the carb.
there are multiple reasons it is failing, but it probably just needs to be adjusted. i've worked with old timers that would adjust the carbs just outside the test stations till it past.
i say do the stuff you can, make sure plugs wires cap and rotor are good, and have it checked out.