Wasn't the builders fault. The crank was bought used, I had the machine shop check it out, and they said was ok. Also, the floats in my carb got stuck and dumped a bunch of fuel in the motor. I ran the car for about 20 minutes before I realized what happened. When we dumped the oil, I'm guessing there was about 6qts of fuel in there. That could have played a part in it also. We are gonna index the crank monday to verify. We'll see.