[69 longhorn]

Im not familiar with that one,but the old Hurst shifters had a plate that bolted to the side of the trans,& a brace that ran to the top corner on the other side. If the handle is removeable,you can get the shifter pretty well in position,then mark the hole from the bottom. Once the hole is marked,I would drill holes in the corners ,from the bottom,& then go topside with a jig saw to cut the opening. There are oversized boots if you miss the hole by a little(been there,done that!). after you get the shifter mounted,chok the wheels& put the trans in nuetral to adjust the linkage. There should be holes in the shifter arms to slide a 3/16 or 1/4" pin through to line up the nuetral position on the shifter. Once that is pinned, & the arms on the trans are in neutral,the lenghts of the rods are adjusted . hope that helps.......69 longhorn.