I currently run a 92 gt with FRPP B springs and Tokico Blues with Adjustible lowers on the rear. I just ran my last track day yesterday and my car slid all over the place. Found my rear shocks were blown out. But anyway so thru the winter befoe next season, I will be adding coil overs, Koni SA's, 5 lug conversion with 94 spindles and 03 cobra brakss. Since I feel that I am really pushing the car more then before, I notice alot more body roll and lean in the turns. My question is I dont understand wheel rates and I need to know what spring rate for front and rear to get. Mostly track car very very little street driven, maybe 100 miles a year on street. Im going to keep my MM adj XD lowers in the rear, so the spring will not be a coilover spring. What do you all suggest. I have heard of people going higher then375 on Koni SA's. How much stiffer will the car be with a coi over rate at 375 and rear at something else.