im with you as well on ditching this system. i spent big money with SCP to have it rebuilt at SIA electronics. Its been maybe two years and the last time i was under the car, it looks like that stupid thing is leaking again. I believe i have a bad wire somewhere as well that causes the ABS like to come on or off (this is my conclusion when i scan for codes and it gives a main valve error but it checks out when i ohm the switch and the harness. the light will go off and there will be no codes. i believe it too be some weird short or power failure to the control module). Anyways, i say all that not because i need help with it, but just share in your frustration with this system.
Towards the end of that long thread on the conversion, there is discussion about using the baseline thunderbird master cylinder instead of the CV master cylinder. My understanding is that these had 4 ports because they were designed for diagonal braking but you can close off the extra port with a bleeder screw. I sort of like this idea instead of the junction block stuff, but the only person that seems to talk about this method is Ralph P.