Which yoke is a stronger setup?

[stubz616]

I'm putting a NP271 in my truck out of an 03 superduty. It has the flat yoke at the output of the t case instead of a slip yoke, which I'm going to use, and a slip joint in the shaft itself, but was wondering on what you all thought is a stronger setup for the rear end side of the driveshaft... The flat ford style that's through bolted into the flat threaded yoke or just keep the factory yoke with straps and bolts. I have to get a driveshaft made either way, so I have to decide which way I'm gunna go. Thanks

 

[Pony_Kegger]

I have broken the 1485 slip yokes. Also broke a 1555 yoke. I went to the flange style on my puller and have not had any problems thus far with 1550 joints.

 

[ahale2772]

Flange are stronger