As I recall there were several different Model A springs and the high arch one that is in the Speedway calaloge is much stronger than the almost flat spring that was stock on the original roadster model. Of course you need to space the shackels for the spring you use but you might consider removing one or two of the small upper leaves for a better ride. A lot of modern rods have a Ford 8" or 9" but that pumpkin looks dreadfully plain compared to a banjo quick change. You can't even put a dress up cover on the 8"/9" so on my 8" all I did was just paint it black! Some folks frown on the use of a "fake" quick change but if you have a real one you should flaunt it!

Don Shillady
Retired Scientist/teen rodder