It turned out most the reason it was so low was the rear diff mount was made of an old tin can or something, far too thin for a diff mount, and was bent, and just before we went to change it, it completely snapped.

The Cosworth 7.5" diff is a viscous LSD, which is never great, and this one was awful, barely any better than an open diff, made handling and grip pretty crappy to be fair. It was removed and welded up, and now grip and handling is 100 times better, in fact it's the one mod that made me love the car.

Aside from to help de-gay the car, the reason I added so many black panels was to hide the white paint.