My 66 C-code was recently rebuilt but not happy with Pertronix 3 so went back to stock Distributor with igniter module. Tried stabbing dizzy numerous times but a 1/2" short. Engine on top dead center as I pulled #1 plug etc. Oil pump hex 1/4" drive is 1/2 " below the (opening)casting. But since the bottom of distributor goes in 1" it would still engage a 1/2".Tried 1/4" nut driver to rotate shaft a few degrees but no luck .I tapped on end of shaft lightly and it sounds like it's seated in oil pump. Have had distributor in and out numerous times never had this B.S. Question is how far is your drive rod below opening? Or any suggestions thanks for any help in advance as might have to flat bed to shop.