>>76448942 (OP)
Barbell Curls with a wider grip for short head. Then do EZbar curl with a narrower grip for long head.
Lying Extension (not skull crushers) or French Press for long head. Replace Incline Press with CG BP for long head. Yes. CG BP is also a replacement for Incline Press as well as being a triceps exercise. More shoulder flexion = more upper pec.
6-8 reps and focus on getting stronger in the lifts. Decrease weight and slow down the reps if you think you're swinging.
Arms are also easy to overtrain since they get a lot of volume from chest/back work. If you're doing say 10 sets in a week for chest with compounds, only do about 4-5 sets for triceps in that same week. Doing 10 more sets for triceps would lead to 20 sets with compound accounted for which may lead to overtraining.
Reducing the amount of chest/back/shoulder compounds you do will help. Specialization is also known to work.