Engine Swap Question

Hell can you knock the weight off the balancer and run it before you pull it? And you can see if there are any weights on the convertor from under the car. They will be on the flex plate side of the convertor if there is any.
I can inspect the torque converter, but I've already disconnected everything to pull the motor. Should have posted this earlier. Lesson learned! I have found so much good info here on A-Bodies, I should have known better to ask first. We'll pull it and give it a good going over. I If we don't find a problem inside the motor, I think I'll rebuild my T/C and get a new balancer. (Summit Racing is 10 minutes from my house) If you can think of anything else to check pass it along. I appreciate your knowledge and help!