The lighter the better. My 63/64 B Bodys have been 120-130 on the rear. You need a rate that puts the shock in the correct range of travel. That would be in the the middle or slightly compressed. These rates will do that. Track only you might even get away with 110, but it would be tight on compression travel. My Belvedere ran a string of 1.25-1.26 last Saturday foot braking on 10.5x31. Doug
