steering coupling

My 72 Demon has a 75 Valiant front end under it. I put the Firm Feel PS box out of a Dippy on the K-member. I had no problem with the column connecting to the box. The Pittman arm on the FF box had to be changed out for one that would fit the A-body geometry and the larger diameter output shaft on the FF box. (Bill has his facts on the output shaft correct, IMHO.)