Okey everyone, I'm getting conflicting reports whether or not leaf springs listed to fit 64 and later darts will fit a 63? It's the 111" wheel base with a slant 6 and 7 1/4. Do not see why Chrysler would have changed them a year later.
I'm not sure about the 63s but I found that when I tried to install later model A body rear springs in my 62 A body the later springs had a larger diameter front eye mount. The rest of the spring had the same dimensions.