The lockouts can be changed and you should go better axles anyway if you're pulling some big tire. According to my son anyway. He broke an axle and hub pretty quick once the 450HP 440 went in. Of course he probably wouldn't break any parts if he quit pulling Fords through where he already went with his Dodge.

Sheldon

2015-03-14 23.04.09_zpscvgbwltm (1).jpg

Sheldon