what sean said, it is amplified by the progressivity of the front springs i believe but imagining that you threw in a chevy v8, which is much heavier then the datsun block (assuming not too much alluminum was used) and thent he addition of a tranny meant to cope with the torque (more weight, in beefed up gears) you probably would have lowered the car an inch or two... just sell them, there isnt anything wrong with them.