Anyone running a 904 behind a 340?

Bakerlite said
What really secures the 727 sprag in the trans is its serrated OD. All those little teeth biting into the alloy.
That set screw will not stop the sprag from spinning because it goes into a slot which is machined all the way around the OD of the sprag. All it's going to do is stop the sprag migrating forward in the case..

Totally agree. Bolt in is better, but the better sprags also increase the roller count as well.
My point was on any torqueflite it is a common practice to upgrade the roller clutch.
The 904, because it is riveted into the case,
Was a better design, but there is now an upgrade as well for the 904.