318 LA rebuild after losing a valve seat

Make darn sure the convertor is in all the way. The face of the TC has to be inside the bellhouse. When that is done, rotate the TC about 20* one way and then change directions I usually can hear the pump drive slamming the pump with a satisfying cluck every time it changes directions.
Thanks, I did check and the face is certainly behind the plane of the bellhouse. I can definitely feel it engaging the pump when I rotate it back and forth.

Any sort of final to-dos or a good checklist before dropping in the motor?