Those tires are a little on the big side. 215's might be better. Springs can be a crap shoot. Detroit Eaton is supposedly the experts. But they sold me way too stiff Moog springs for my vert GTO. I had to beg them to take them back and give me hardtop springs which were better. I'd get them from either Ames or Detroit Eaton for the best chance of getting the correct ones.