I know this question gets ask an aweful lot..My 1985 Dl wagon is my work car and it usually carries a good payload everyday..I'v got so many rubber spring spacers shoved into the coils and their starting to deteriorate..I think it's time to get new springs...Anyone used the Moog progressive wound springs with good aditional capacity anywhere from 100 to 500 pounds payload and felt they were tuff enough?...Thanks to those who know and answer..