Bullet proof A833?
Face plated hemi box would probably be the hot ticket for a 340. Should live ok as that little engine shouldn’t really stress out a properly built trans. Big Torque and traction will kill them, this one was behind my 500ci hemi and even had a Hyatt built soft loc. it was fun for a few passes.. I was going easy on it trying to get the clutch dialed. This was trans #2. I didn’t have the money to go Jerico at the time so it’s had a TF now for 15 years.