Rear Coil Springs

[Dynomutt]

Will a 3/4 ton rear coil spring fit in a 1/2 ton truck?

I put a set of CPP 4" dropped springs in my 1/2 ton and they are way to "soggy". I'm thinking about putting a 3/4 ton 4" dropped spring in to make it stiff. I had a set of heavy duty standard height springs in there before the drop and the coil material was massive in comparison to the CPP stuff. I still have the heavy duty BB stock height springs in the front with dropped spindles.