Looks like your doing some good work there. The guy that's going my car had to section the Goodmark front fenders just like what your having to do to the rear. The fenders sat a lot lower than the hood and the gap was too big.
The full quarters seemed to fit my car a lot better then how they're fitting on your car for whatever reason. Some welding rod needed to be added to the sides of the trunk lid to take up the gap but nothing had to be done to the top of the quarters to my knowledge. I was using a factory trunk lid though...that might have been part of it.
