Was it doing it before you did the front end work? If so, it could be a rear wheel(s). If it's related to the front end work being done, I would 1st jack the car up and hand spin the wheels to verify you don't have exessive drag with the driver side brake. There should be a little dragon each wheel...may get a rotation-and-a-half with a good spin by hand. If anything needs tightening, I would start with the passenger front.
Check the rears while you are at it. You may have to go more on an 'audiable' sound rather than coast distance (revolutions) as turning one side turns the other (and the driveshaft)...Sure Grip: both spin in the same direction...Open Differential (think 'One Wheel Squeel'): wheels spin in opposite directions.
Is it pulling left with smooth application of the brakes, or under hard braking? Drum brakes can go ANY direction under hard braking. That's one of the primary detractors of them.
Hope this helps.