Which Bergeson Power steering box 1-1/8" or 1-1/4" section width?

[Katfish]

If you're getting a new pitman, get the larger 1.25 style.
Stronger and cheaper

 

[Widow Maker]

If you're getting a new pitman, get the larger 1.25 style.
Stronger and cheaper

70-72 1 1/8” (1.125”), 73-74 1 1/4”