My bet is not enough castor. That CPP setup needs more castor than the stock setup. You need to check every moving part of the front end (and the rear end for that matter) before you add castor shims.
It concerns me that you are using tie rod ends which were seized up. Get off some money and replace your spring shackles front and back, and tie rod ends. Inspect your wheel bearings and torque the spindle nuts to specs.
Is your new CPP drag link parallel to the ground?
What year/make power steering box did you go with?
