Yes that Flaming River thing is much better than the original coupler although not as safe in the event of a head on collision.
Easy to fit if you have good quality sharp drill bits.
Not so easy if your drill bits have seen better days like mine.
It comes about 12 inches long and you need to cut off most of that to get it the right length.
You also have to remove the stock pin through the end of the steering shaft. But they are tough to get out and I gave up on mine and cut it flush with the angle grinder.