As many know I run that homebrew setup in my rig. It works OK, certainly not as well as a true hydro setup, but I did it mainly because it was a fun little project.2 or 3 or maybe several things will cause large amounts of suck there.
If you get the parking brakes functioning correctly, they will snap off the anchor lug on the cast backing plate if you drive off in 4 low.
Not being able to modulate the brakes when trying to do a turn is at best a poor compromise.
Our first set of homebrew cutting brakes using 2 parking brake handles in the stock location worked but only because we had drum brakes and even then we tore up parts at a prodigious rate inside the drums.
Line locks are on or off. Not a lot of modulation. The last part that brings the suck is the rear calipers aren't big enough to lock a tire in a turn.
It’s been in there many, many years, and I’ve not had any issues tearing up parts - but I’m running a 1 ton disk setup back there, so maybe that helps.