I just replaced the original 4-leaf rear springs in my 63 Valiant convertible with stock 340 springs. These were used springs I got at a swap meet a long time ago and finally got around to rebuilding, By rebuilding, I mean taking them apart, sand blasting them, assembling them with new zinc interleaves, plastic spacers and clamps, then painting with semi-gloss black urethane. Left the front spring bushings alone, new shackles. Did not re-arch any of the leaves. I was expecting the same ride height, but the 340 springs raised the back end up almost two inches. (I trimmed the clamp bolts before mounting the springs.)
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