After a crash time ago I decided to build myself that nice frame to straighten the damaged I-beam, was bended in the King Pin mount. ...I used a 12T jack...
Works fine,need to weld some points on the corners,is a good method to repair axle after a bend on the king pin side,,,you can drill holes where you want to position the axle where you need to work on,for others bends i use a classic press....