Hedman makes some that fit PS - I have them on two of my cars, one of which is a 1974 Duster. Seems like most of the other manufacturers also address this application; you should have lots of choices here...
Ray
Chuck's right. Percy's do the trick. Had a ***** of a time with the wife's Dart continually springing header leaks. Found those and now I don't have to listen to her or the car...
:cheers:
Ray