guys im having a heck of a time with this 312



i have checked points plugs wires cap rotor..blah blah

timed it 6 degrees checked dwell



problem is i still have a miss, and can not get the secondary to kick in.... i have good vacuum off the manifold and i changed the diaphragm in the carb... im sure i have it wired right...I hope

any advise would be awesome!!

milo