along with all the sweat expended during the build back in the day when I had a car at that stage there was a big supermarket type scale hanging in the shop. every item got weighed and re inspected for possible reduction prior to installation. some times just shorted the bolts or excess length got cut off. I never kept any records but would like to think at the end my efforts were worth it .back then these were all mostly NHRA stock class rides and anything was a help. I wonder how comfortable those back seat cusions are today with over half the springs removed