Just a thought, but I think your steering idler is going to be a weak link. I'd find some way to go to a thru-bolt idler (68 and up) if I were you.
Either weld a different mount on, or go all the way and section a later k-frame (I've done it, so it's possible) and relocate the motor mounts. The added advantages of the later k-frame having a better swaybar mount and motor mounts don't hurt either. A new mount would be the easiest way, though.
