My '77 FJ-40's 2F dosen't seem to be vacuum advancing (at all). Starts quick, runs smooth, but stumbles at initial throttle and lacks power as the RPM's go up. At highway speed, grades really labor the engine and pings occasionally chime in. The smog stuff's gone, and it definitely IS an advance dist. The carb is new and all lines appear to be OK. My timing is all over the place under the light. The advance mechanism under the cap won't budge...it should, by hand...right? I think my best option is to fork the $$$ for electronic ignition on a NEW VA dist. I'm looking seriously at the Downey '77 and older VA with the Flame Thrower ignition/coil. Any thoughts?