Disc Brake Conversion Failing

I did the drum to disc swap last summer. I haven’t gotten around to the proportioning valve. I bought an adjustable one but I’m hesitant to cut my line and make another potential place for a leak.
Here’s my question… Is a factory proportioning valve a direct replacement for the drum drum distribution block ?

View attachment 1715980703
Looks like the FMJ disc's that came on my Sat. Sway bar car, PO (big time Mopar guy) let it roll, without swapping calipers. Leaving Bleeder on the BOTTOM. what a Raw deal. So obvious..... yet Royally Rectally Annoying