In an effort to improve the physical appearance of my rear spring of my '66 big block removed and purchased (at a local swap meet) another rear spring cosmetically nicer. Both are dimensionally the same, knurled leafs (slightly more prominent on top spring) and 45 degree cuts on main leaf. Top spring in image is original spring, lower spring is the newly purchased spring. Top 3 leafs on original spring stand straight out w/o load on spring while newly purchase spring all leafs follow the contour. What's going on here? Does having the big block option make the differnce. Lastly does it make any difference should I choose to used the newly purchased spring? Thanks in advance.
Top spring is original to car, lower spring-newly purchased

Top spring is original to car, lower spring-newly purchased


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