No you are thinking of 69 and earlier a bodies they just used and add on valve. Some e-bodies used that also. Click on the rebuild link and read the info. They explain the years on the site in different pages. The early cars that valve was just divorced from the junction /separator the later cars it was integrated. The valve he needs for a 71 is the one he pictured. Its a weatherhead valve. The best one to use for the 4 piston brakes. It was on the 71 car it is pictured on. It is the same on my 71-72 Demons and all other 70- 72 Dusters I have owned. The kelsey hayes style I took off of a 73 340 Duster.
