Dymanic converters makes stalls for the 350c trans. They are the best units i have used. TCI was kind of soft, but i might have not had enough compression in the 323 mopar engine build for the cam. The dynamic's is similar to the T Type/ Grand national GNX units. If you ever rode in one of those. About 2800 stall rating . Foot brakes to 2200, flash to 3000. Cannot tell it is there durring cruise. A must for the performance auto experience. Very reasonable price. can pull the trans back and install in 2-3 hours.
I would not cut the input shaft.