Need brake help badly!

[54Caddy]

Okay so ive had this front end pull for a few months now. Ive been trying to fix it but nothing seems to work. My front passenger caliper is lightly grabbing causing a pull. Ive checked the bearings and they are not tight one the caliper is removed it spins freely. I have new brake hoses, the lines aren't cinked at all, Ive replaced the front caliper, also put new bolts because my old one where over tightened. What the hell can it be
Heres a list of new parts and problem still not fixed:
New calipers
New caliper bolts
New bearings inners and outters
New brake hoses
New proportioning valve

What can it be, there is another thread on the 67-72 section and someone said the spindle can some one explain why the spindle would effect it, also when i do a full turn to the left i can feel the passenger side moving, like its poping or falling over in a way hard to explain wonder if that is a spindle problem