741 Rear

I have had 4 340 dusters and they all had factory 741s never had any trouble

All my HP Original "A" bodies, 67 273 4 speed Barracuda 68 318 Barracuda, 71 340 4 speed Duster, had 741 centers also. Not sure of the 68 383 Barracuda, pretty sure that was swapped out before I got it.