lol I would just put the KYB shocks you got on, and save my pennies for some new leaf springs. They will make a large difference. You don’t need or want the shock coil springs.
I see two options on RockAuto for leaf springs, both very similar in price. Maybe I'll just go with the new shocks without the coil springs until the time comes that I want to buy new leaf springs. I may still try the Superior leaf spring helpers.