Reply to "Tasks Required if proportional valve taken out"

First, I need to clarify I am a "keyboard" mechanic and thus all my comments are opinions without any actual application.

Here is a diagram of the brake fluid paths and purpose of each device.

the "wired tee" is the warning switch that lets you know you have a leak in either the front of rear.
.....If you don't want the switch, it could be removed. (you will need to add a brake light pedal switch)
.....If you want it for looks, the internal seals need to stay working. a "centering tool" can be used to replace the switch piece and keep the spool centered. this would let you keep the pressure activated brake light switch

the Propertional is the other block
....If you don't want if, you will need a tee to provide tubing to left and right
....If you want it for looks, the internal seals could be removed. the exteranal would still be needed