steps you gotta do. i'll let you decide.
1.) jack your truck up and support it by 'stands.
2.) unbolt your whiles, your brake calipers and support the calipers.
3.) you could then break loose the upper ball joint and throw a jack under the lower control arm.
4.) remove the castle nut after jacking the jack up to support the spring and remove the nut
5.) slowly and carefully let the jack come down decompressing the spring.
6.) swap springs and rebuild everything.
that's it. i did spindles and springs with the help of a buddy, cakewalk.