Need help in alignment and braking problem.

Thats a good one. Do you have power or manual steering? That will make a difference on the caster. If the Car is pulling right it means you need more caster on the right or less on the left and or less camber on the right. Caster is the main cause of a pull on rear wheel drive but camber can also effect. Also check the ride hight while in the alignment turn plates the lower side can cause a lead. I checked spec the other day on a I think 72 duster with power steering. caster was .5 - 1.5+. I had a bad bad brake pull left on my Duster also once. I had a badly cracked lf strut rod bushing inside of the K frame The wheel would move on brake apply. As said by 69signetv8 a internal calapsing brake hose surely can do that will get worse with heat once being driven. My Friend with a 68 Valiant had a bad brake pull. We found the issue to be a internally restricted prop valve.