Got it started but now a question

So as some of you may know my car was not running at all and i finally got it started but its running like spit. My question is i have a billit ready to run msd dist. in the car but replaced my coil with a stock style from autozone. Is it possible that the crappy running is because of a mismatch of my coil and dist.? before i had a blaster2 coil in the car and i cant think of much else that i changed, besides messing the the float levals a little but i have adjusted them out correctly. So is it possible that my coil is the problem?

ok so scratch that i got a spare coil inthat i had at the house and it still does the same thing. so i guess im leaning towards a vaccume leak? i just dont know where it would have come from. the car wont crank unless i give it some gas right before then crank it over. and even then it will only run for a second and then almost seem like it sputters out, but after running increadibly rough. and if i give it gas to keep it alive it runs rough and then will still sputter out and die. i know its getting gas. so i dont know really where to turn now