Hurst Shifter Extension?

My late brother-in-law used to have some type of rectangular box bolted to the shift mount on the tranny (A-833) which raised the mounting location of the shifter by maybe 3-4 inches. I'm guessing it came from Hurst or Mr Gasket. This is going back some 20 yrs ago. He had an E-body Pistol Grip in his 70 Dart.