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I would think if the left side is getting more traction the left wheel will be pushing forward faster than the right therefore pushing the front of the car to the right.
Idk if this is exactly the same but if a tank stops its right tracks and goes forward with its left it will turn the front towards the right.
If you have a boat with twins and only put the left motor in gear it will turn towards the right.
If we're talking a launch off the line it would be a specific setting and circumstance which would differ greatly from something like an aggressive downshift while in motion.
A large part of the question is going to go into the suspension geometry settings, tire pressure/sidewall wrap, and the fact that every part of that suspension is now experiencing deflection out of parked/standing spec due to the force applied by the engine and drivetrain and the shifting weight of the car as it (hopefully) lifts and tilts back onto its haunches and boogies. Example: measuring it in the parking lot you might have a zero rear toe setting but under load it deflects and is now positive.
Verify torque settings. Because why not. And safety.
Easiest fix from there is tire pressure up or down to straight it out. Ghetto, but it works.
Or if I'm barking in the wrong direction let me know.
Definitely Left. Mopar added an extra Half leaf to the front of the Right leaf to compensate for the engine Torque leaning the car to the right side and therefor having more weight on tire. The bottom two half leaves on the right side would 'bounce] the same (for equal ride) but the extra front segment stiffened the car's front right spring for an equal launch. Stiffen the shock settings a notch to stiffen the right side to compensate for the torque roll.