OK, so what steering coupler do I WANT???

I know that the factory one is made to move, because the body flexes, I have not used any rigid type, would be interested to see if they have.
I built a 2400 lbs. vega, w/ a hot 406 in it , and had to go to a home made steering shaft, w/ a u joint/ no problem !
Also have one in my 505" fastback, so far so good--------------