ALRIGHT! SO.
I went, and was able to test whether DBT's Super Saiyan hair works with Terraria Overhaul, as explained in the previous post above. The problem being, as mentioned in said post, that with them both installed, when my character turned Super Saiyan, she ended up with two heads; the Super Saiyan, golden-haired one from DBT, and the normal looking, rotating-able head from Terraria Overhaul's Player Rendering improvement!
So, in order to use both mods and avoid that silly-looking result, one of these effects's got to go. Namely, the one not turning you into a golden-haired god of ki power. To do so, go into your Documents/MyGames/Terraria/ModLoader/TerrariaOverhaul folder and open the Config.json file.
You are looking for the Visuals category, under which you'll find the line:
"noPlayerHeadRotation": false,
...Set it to true instead.
BAM. Problem solved. You get to enjoy all of Overhaul's sweet improvements, AND not look like a two headed Human/Saiyan weirdo when you go Super Saiyan or above. Cheers!