i am helping a friend with a street stock that is not a metric chasses. i know you can buy a 2 " longer rt frt lower for metric and camero chassis, but my question is what if there is not one available for your particular chassis and you have to build your own, would you lengthen it between the ball joint and spring seat or the inner pivoit point and the spring and where are the chevys lengthened ? thanks sorry, wrong section reposted in tech