Progressive springs are absolutely garbage for cornering. You will hate them. Your truck will roll very easy. When it comes to cornering you want it as stiff as possible, ideally you wouldn't even have springs. But there are always these things in the road called bumps. So do deal with those you add springs. Soft springs will make you roll. That is what progressive springs are for the first 1/4-1/2 inch. Then they tighten up. Great for grandmas car and a smooth ride but bad for cornering.