The OP already indicates a left/right suspension imbalance. Old bushings don't like to be mucked with. The rubber developes a memory and likes to keep deforming the same way so it's critical to keep them happy, otherwise they will deform or tear and further throw out your L/R balance which is where torque steer thrives.

The mechanism for torque steer is identical to that of steering pull under braking. Scrub radius or longitidinal force - if they're not equal left/right, it's going to pull.