mods to warrant 104's??? spark might not be hot enough to fire that cylinder if there arent any substantial modifications increasing cylinder temps, and if possibly and i mean its a stretch but maybe compression on cyl1 is just low enough coupled with the lowered heat of the 104's causing cyl1 to miss, but im gonna stick with the first and get some autolite copper 605's... also nasty vacuum leaks can occur between sc and lim and sometimes even changing the sc gasket wont neccessarily fix the problem... what i did was place some GRAY rtv on both sides of the sc gasket around the intake port and that fixed it... best way to fix tht one is to have the intake manifold resurfaced tho... just some suggestions good luck
