Bubba engineering could definitely be in the works on the clutch shaft. It needs to be right or you will have trouble.

Many soldiers when they heard the infamous clicking or clunking of the axle nut coming loose, applied "ugga duggas". Use a 3/4 to 1/2" adapter if your torque wrench is 1/2". The "ugga dugga" will get you home unless you give it too much and strip the nut, something that is very hard to do. Always best to torque it if you can. 150 Ft Lbs is a lot. It is good to know you hit the number.