I surely hope guys aren't going by the manufactures advertised spring height installed and advertised pressures. Each and every height should be measured and the springs set up on a calibrated spring pressure checker

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time