Call CE tech and ask them what they think
My Duster weighs 3400 lbs with me in it at race trim, I drive it on the street and it has a set of Strange Engr. single adjustable coil overs 16.5 extended with 170 lb. springs, it does ride fairly nice considering the solid mount ladder bars
I bought another set of used double adjustable Stranges the same length and that set has 150 lbs springs, they came off of a 1968 Hemi Barracuda race only, he went to a set of Santuffs. I have not tried them (springs or coil overs) yet so