I'm getting closer to sorting out the new suspension for my 65. I'm wanting to go with 1" lowering springs in the front, mid eyes in the rear. Looking at the springs, there's 1" GT and 1" 560lb also progressive rate ones but I don't know if they are lower? This is all from Opentracker if that matters. Not sure what the difference is in all this, want a nice handling, nice stance car. I'm thinking the GT ones would suffice although I do like the idea of the progressive if they provide the 1" drop I want. Any thoughts on this would be appreciated.