Composite leaf springs om 69 Camaro

[JKnight]

When coupled with a well engineered lateral locating device, the composite springs are left to do a very specific job; not unlike a coil spring in a link arrangement. They are not very good at controlling lateral movement, so you have to help them out with a locating device (panhard, watt's, etc) With that done, my experience/belief is that the composite leafs do their job every bit as well as a steel spring, while having the benefit of subsantially reduced unsprung weight. That benefit should not be overlooked or trivialized, as it makes a noticeable difference.

The OP is in Denmark and can not go with a link arrangement without running into significant legal issues with the local tax-man. I will agree that the geometry of well sorted 4-link arrangement has benefits over the leafs, but many have proven that leafs can work very well in competition, even against those with link style rear setups.

I don't know if a composite spring would be worth a significant premium over a well-engineered steel spring, but I can tell you that they should not be written off as an option just because they aren't more popular.