Absolutely! The stock control arms have a ton of slop in them and will cause some wheel hop and won't let you put the power you currently have down to the ground.
A set of SR Performance Upper & Lower Control arms will definitely do the trick. You'll notice big gains in your 60 ft time, less wheel hop and much better traction. The UCA will also let you adjust your pinion angle, if your Mustang is lowered or you have plans to lower it this is must have. If not, your pinion angle will be off and you could experience some vibrations.
I hope this helps! Please let me know if you have any questions or need some assistance.