[rjs53]

Looks like someone turned a half ton into a three quarter ton. If you want to go back to coil springs it might be easier to buy an aftermarket cross member. Then again it might be easier to find a half ton frame and put your stuff in that. Might find someone on here that has changed out control arms for aftermarket and get a good deal on original parts, and then you could bolt in place. Nothing’s impossible, just depends on what you want to do