Hurst mounting torque
I'm talking the shifter mechanism itself not the adapter plate with the Allen heads. Sorry about the confusion. The shifter has 2 bolts. A 7/16 and a 3/8 maybe or 1/2 + 7/16. Service manual and holley directions basically say tight. I'm probably overthinking it as usual.
Those Allen's are blue loctited in. I actually lost 1 once. Shifts better when it's not swinging around!