Just an update. Drum brakes on rear. Further, I had since got fluid coming to the rears. It seems the rear passenger side isn’t bleeding as well as the others. It’s gets fluid, but doesn’t shoot it out through the tube as the other 3 do. I’ve bled it twice now, and the 2nd time feels better, but still no where where it should be in terms of brake feel. I am googling troubleshooting possibilities online, but can’t seem to find the answer. I know when I cut down the screw head in the booster I didn’t make it exactly flush, prob 2-3mm longer than flush, could this be the cause? Further, can anyone please clarify which lines on the master are for front and rear? Better double check they’re going to the right place.
Edit: there also seems to be a noticeable sound of air being pushed when the brake is pressed. I don’t recall the same sound prior to doing this work