Hy bruce j, I did some more research, according to my parts book 58 was the last year that had two different length pull back springs, p/n 3694516 green 3 7/16", 3694799 black 3 7/8", after that they used 8 barrel type springs. My United books seem to have missed that fact and only list the barrel type. I'll keep looking, but see if your supplier can cross the o.e.m. numbers I gave you, hope that helps, let us know what happens please.
