Update on the Catalina:
Roto is shredded.
5 inch by 3/4 inch hole in torque converter housing, BLACK, Pitted clutches, broken thrust support in case. This with only 2000 miles of driving with the 455 and a total of around 40,000 - 50,000 miles since I rebuilt the tranny.

Hopefully the SuperHydro will do better!