i,d put twin hairdryers on it with a blower on top with a digital fuel injection unit. Should be good for 2000+ horse. And run on pump gas in 100 degree heat at 180* in traffic. I miss the join date in the avatar.
Seems a short spring would work if it had a stiffer spring rate. Id pull them and lower the body with a floor jack where i wanted it and see if i could adjust yhe camber? till i had a decent alignment. You might could get a few inches. Then you could see how tall you need the spring compressed.