I installed this in a 1970 GS 455 but it may fit other cars. The old one was cracked. The part number for the new one is 23-5905. It fit perfectly and appears to works fine (car is still apart...), except as noted below. I found it at: Old Air Products 1201 Forum Way South Fort Worth, TX 76140 (817) 531-2665 www.oldairproducts.com I found that I had to trim the sides of the arm a bit to fit in the linkage. The linkage is "u" shaped. I will update if there are any issues found later!