At this time you need to trust someone. This no spark could be part of what has been wrong all along. Possibly the distributor replacement was not needed. At this point it needs to be diagnosed. I would at least allow them to run codes and to give you an estimate. It is always a possibility that the crank sensor was damaged when the transmission was removed and could of been the noise you heard in the bell area, These are guesses on my part. However get some sort of diagnosis.