MSD Ignition - No Start

I used MSD's test of unhooking the coil wire from the dist and placing it near ground, then tapping the white wire from the MSD box to ground and I got a nice blue spark each time. But that doesn't rule out a low battery not supplying enough power while cranking, and that doesn't rule out the distributor being the problem. I have the battery hooked up to a charger now, and then I'm going to try a shot of starting fluid if that doesn't do it. Thank you for all of the replies! I'll report back afterwards.