So far there are only three of the default hairstyles that can go SSJ.

Hairstyle 1: Transforms to Vegetto

Hairsyle 5: Transforms to SSJ2 Teen Gohan

Hairstyle 7: Transforms to SSJ Goku

Option 2: Transforms to SSJ T. Gohan

Hairstyle 8: Transforms to SSJ4 Gogeta

Option 2: Vegito to SSJ4 Gogeta

I can't think of any other transformations for the hair, I need feedback and input from you guys so that I can update this.

Put HUM files in datap3 -> chara -> HUM

Added SSJ4 Gogeta Hair

Added Vegito to SSJ4 Gogeta Hair

Added SSJ4 T. Gohan Hair

Fixed Black Lines