BOSSVETTE is correct. If you removed the distributor during installation of the coil, you may have gotten it out of position for #1. If you didn't remove it, #1 will be where the rotor is pointing when you have #1 at TDC. Find TDC and see where the rotor is pointing. That's the #1 position. Start installing the wires from there. You can also determine when #1 is at TDC by shining a light into the spark plug hole and actually see the top of the piston. When it starts to go back down, stop there and note the position of the rotor. That'll be close enough to get the wires installed and then all you'll have to do is time the ignition.
If you didn't remove the distributor but merely loosened it up for some reason, all you should have to do is re-time the engine once everything is back together since it ran before you started fooling with it. It will still start if not timed properly but it will run rough as a cob.