For those that think shifter location is an option...it is not unless you want to do MAJOR surgery. On an E-body the shifter does not enter the top of the trans and move the rail directly... it mounts to a bracket bolted to the rear of the trans.A clevis type device (red arrow) moves the rail (green arrow)I also had a lot of shifter shake which Kiesler repaired for me while the trans was in for repairs.