mouks

I want to install leveling springs on my truck, I was going to buy LMC springs because I have other parts to buy from them and they have the lowest shipping rates to my country. They sell the same kit for the Bronco or F150 and it's rated at 350 lbs per inch, from the picture on the website they look like progressive springs Front Leveling Kit | 1980-96 F1501980-96 Bronco | LMC Truck Is anyone using them ? I have a 4WD F150 supercab with 5.8l engine and I'm adding a 100lbs bumper so I'm affraid it would be too soft.