You don’t need to bench bleed it first
Do you think the factory would be messing with dripping brake fluid?
And if you bench bleed it
Do you think you can install it without air bubbles in the master or the lines?
There are two holes in the master between the cylinder and the reservoir
You will not be able to trap air in the cylinder unless something is already wrong
Put the thing on dry and save a mess
Then bleed it on the truck
Just like the factory did
I’ve done this many times
It works every time
Do not over travel the piston
Do not install it from the wrong end
Just follow the instructions in the manual
And everything will work out perfect like magic
-s