I bought these UCA's, along with several other parts from PST back in January to go along with the 5.9L stroker build I'm doing at Greg's shop, since we were dropping the K frame anyway. I have a full assortment of suspension pieces from PST on my Coronet, including tubular UCA's, and I've been very happy with their product and customer support. The UCA's contact the bump stop on the Coronet.