Which longacre for bump steer

If you cranked a buch of caster into it, then yes you created the bumpsteer; more so if you also cranked in more than 1* of negative camber
Some of the pull tho could be in the Wheels, and tire heights. If the center of the contact patch is not where it's supposed to be, in reference to the SAI, that easily contributes to twitchiness, as can not enough tire pressure.
So, you probably have some work to do alrightey!