lost the fire

I just put a newly rebuilt 340 in my car, running through breakin nicely, putting a few miles on it to get bugs out. Get brakes to work properly and all that stuff, ran to a local show at Blacksmith Lounge for a few hours, when I got home I had a leak valley gasket in front. I cleaned it up and blew some sealer on the gasket to seal it, or try to. Let the car sit over night to let the sealer dry, now I have no spark, I am flustered and hoping someone out there can point me in a reasonable direction, it is thursday and mopars in the park is on Saturday about an hours drive away.:violent1: