im sure there are tons of threads about this but how much work is involved with throwing some 3/4 ton springs under my 99 1500 4wd? or should i just get the leveling kit?

 

It's the same amount of work, but new springs will cost you more. If you like the way your truck rides then just do the leveling kit as it won't change ride characteristics noticeably. The 3/4 ton springs are stiffer and will be noticeably different.