rear coils the same for 60-62 &63-72?

[HumphreyMurdoch]

Hey guys!

I've been looking into getting new rear coil springs for my '62 1/2ton longbed and I've seen listings saying some fit 60-72 and others say 60-62 only.

I'm planning on lowering with coils but even listings for stock coils say one or the other.

Is there actually a difference??

[AcampoDave]

The earlier springs have equal spacing between the coils, later ones have a progressive spacing. A section of closer spaced coils is built into them for added performance under load, while the section with wider spacing helps to soften the ride when running light.

[HumphreyMurdoch]

Thanks AcampoDave!

So other than the spring rate, they'll interchange?

[AcampoDave]

I'm pretty sure they will. Can anyone else out there back that up?