Mostly so I have record of it myself but for anyone else maybe curious... I went with 3/16 hard brake line with 3/8 - 24 nuts, the new 3/4 ton brake conversion brackets and calipers I got from lugnut4x4 use a 10mm banjo fitting. I was pretty reasonably certain that was the correct size when I ordered over the phone from absolute hose and fittings lol but it worked out so I was glad. So yeah...
But umm, I still can't lock the front brakes up, so...
I'm pretty sure I have a bad brake booster.
I do wonder if I should just step down to a 1 1/16 t100 master, is this 1 5/16 too big?
Is the vacuum pump operating within a normal range?
Fxxx me.